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Congressional Investigations

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MoFo's congressional investigations team is experienced in handling and resolving high-profile and complex issues. Learn more.

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2026 MoFo Tech Law Summit: Innovation Under Pressure

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Congressional Investigations Webinar: What to Expect from the 119th Congress

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Congressional Investigations Quarterly (Q3 2026)

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How DC Circ. Ruling Permits Playacting Bribery Defense

AI Safety Is Moving Up Congress’s Oversight Agenda

Congressional Investigations Quarterly (Q2 2026)

Justices' Obstruction Ruling Clears Venue-Challenge Path

MoFo’s State + Local Government Enforcement Newsletter (Spring 2026)

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Democrats Grapple with Trump's Push to Limit Transparency Within the Executive Branch

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Todd Blanche takes his turn on the hot seat

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A New House Task Force is Taking Aim at Everything from Free Speech to Federal Programs

Morrison Foerster Named a Top Firm for Investigations + White Collar Defense by Chambers USA 2026

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Joseph Folio is a trial lawyer and partner in Morrison Foerster’s Global Antitrust Law, Congressional Investigations (co-chair), Crisis Management, and Data, Cyber + Privacy Groups, with more than a dozen years of experience leading complex government investigations and high-profile litigation.Joe has extensive experience in cartel investigations, congressional investigations, and complex civil litigation. Having served in all three branches of the federal government, and with his experience in both criminal and civil litigation, Joe is able to leverage his insider knowledge across a variety of enforcement perspectives to guide clients through difficult cases. He is also a member of our global Sustainability + Corporate Responsibility steering committee.As a prosecutor in the Antitrust Division of the U.S. Department of Justice (DOJ), he investigated companies and individuals involved in domestic and international antitrust cartels. Among them, he oversaw all aspects of the investigation into generic pharmaceuticals as the case’s chief of staff, including the handling of the parallel multidistrict litigation case brought by several state attorneys general and private plaintiffs. He also prosecuted and investigated cases in the international freight forwarding industry and cases involving bid rigging in state infrastructure projects.Prior to joining Morrison Foerster, Joe served as Chief Counsel for the Committee on Homeland Security & Governmental Affairs, the chief oversight committee of the U.S. Senate. In this position, he oversaw a variety of investigations, including the coordination of investigations with other Senate and House committees with overlapping jurisdictions. He also advised the committee on all policy issues falling within its broad jurisdiction, including cybersecurity, border security, domestic terrorism, election security, supply chain security (including 5G policy), and reforming the National Emergencies Act. Joe advised committee members on oversight of the Cybersecurity and Infrastructure Security Agency (CISA) within the Department of Homeland Security, legislation providing CISA with administrative subpoena authority, the creation of the National Cyber Director, and oversight of government and private efforts to protect against and respond to cyber breaches and ransomware attacks.While at the Federal Programs Branch of the DOJ’s Civil Division, Joe handled complex, high-profile litigation, focusing largely on national security matters, and his clients included the FBI; the Departments of Defense, Homeland Security, and State; and several members of the U.S. Intelligence Community. He also represented the Export-Import Bank against multiple administrative and constitutional challenges. Due to the cutting-edge nature of this litigation, he has experience navigating the inter-agency process when cases raise novel legal or policy issues that must be resolved at the highest levels.Joe received his B.A., magna cum laude, in philosophy and government from Georgetown University; M.A. with honors in national security studies from Georgetown University; and J.D., cum laude, from the George Mason University School of Law. After graduating from law school, Joe clerked for the Honorable Richard L. Voorhees in the U.S. District Court for the Western District of North Carolina.<h4>Representative Matters</h4>Antitrust<ul><li>Representing a major U.S. healthcare company in a criminal antitrust investigation of alleged “no-poach” conduct.</li><li>Representing a senior executive of an international company in a U.S. criminal cartel investigation.</li><li>Representing Nexstar Media Group in a putative class action alleging that certain media companies conspired to fix the prices of local television advertising.</li></ul>Congressional Investigations<ul><li>Representing Andy Karsner, a member of ExxonMobil’s board of directors, in response to a high-profile House Oversight and Reform Committee investigation regarding the role of the fossil fuel industry in addressing climate change, including preparing him to testify before the committee.</li><li>Representing a former government official who testified before the House Select Committee to Investigate the January 6th Attack on the U.S. Capitol.</li><li>Representing a Fortune 100 company responding to inquiries from committees and members regarding its policies and practices.</li></ul>

Joseph Folio III

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Kimberly Hamm is a partner in Morrison Foerster’s Investigations + White Collar Defense Group and co-chairs the firm’s Congressional Investigations and Securities Enforcement practices. Kim draws on decades of public- and private-sector experience—including as General Counsel to the Speaker of the U.S. House of Representatives and Chief Counsel to the Chairman of the U.S. Securities and Exchange Commission—to advise companies, institutions, board members, and executives on congressional, federal, and state investigations, and related regulatory and policy matters.<blockquote>“Kimberly understands our business needs better than any attorney we work with. She provides stellar service and is highly responsive.” — Chambers USA</blockquote>Kim is recognized by Chambers USA as a leading lawyer nationwide in Government Relations: Congressional Investigations, with clients praising her “sophisticated and nuanced approach to problem-solving.” She helps clients anticipate and respond to congressional investigations, including mitigating risk before an inquiry begins, responding to congressional demands and subpoenas, negotiating with committee counsel, preparing and representing witnesses in transcribed interviews and depositions, preparing executives for congressional hearings and testimony, and advising on congressional subpoena enforcement and related litigation. She counsels boards and senior management facing scrutiny from multiple congressional committees or simultaneous congressional, regulatory, litigation, and enforcement proceedings. Kim brings an unusual combination of investigative, institutional, and litigation experience to the congressional investigations bar. She has overseen investigations from House leadership, conducted investigations in the Senate, advised congressional committees as institutional House counsel, and litigated congressional subpoena disputes. As General Counsel to the Speaker of the House, Kim oversaw investigations across House committees and advised House leadership and committees on investigative strategy, subpoenas, criminal contempt of Congress proceedings, litigation, and other sensitive legal matters. Her experience provides first-hand insight into how political priorities shape a congressional investigation and she helps clients navigate committee demands strategically, often resolving disputes before they escalate to subpoenas, litigation, or other enforcement proceedings. Earlier in her career, as Associate General Counsel in the House Office of General Counsel, Kim advised nearly every House committee on investigations and served as litigation counsel in federal court cases involving congressional subpoenas, investigative authority, and other institutional interests of the House. Her work was recognized on a <a href="https://www.congress.gov/116/crec/2019/04/02/165/57/CREC-2019-04-02-pt1-PgE385-2.pdf" target="_blank">bipartisan basis</a> by House leadership, including her record defending the House’s oversight and investigative authority in federal court. Kim also served as Chief Counsel for Investigations for the Senate Committee on Rules and Administration, where she led the committee’s investigations. As one client told Chambers USA, Kim’s “depth of experience with congressional investigations, including working inside Congress, offers a strategic advantage to her clients.” Kim also brings significant regulatory experience to her practice. As Chief Counsel to the SEC Chairman, she advised on congressional oversight, enforcement and regulatory matters, major market events, financial stability, and significant agency initiatives. That experience informs her counsel to clients confronting matters where congressional scrutiny intersects with regulatory enforcement, policy, and litigation. Kim also previously led regulatory and policy advocacy for a leading global asset management firm. Kim is a frequent author and commentator on congressional investigations and SEC enforcement. She co-authors Morrison Foerster’s Congressional Investigations Quarterly and the monthly Top 5 SEC Enforcement Developments newsletters and provides commentary on congressional and SEC developments to leading media outlets, including The New York Times, The Wall Street Journal, and Politico. Prior to joining MoFo, Kim led the congressional investigations practice at another major law firm. She began her legal career in the litigation department of an international law firm. Kim received her B.A. from the University of Florida and her J.D. from New York University School of Law. <h4>Representative Matters </h4><ul><li>Represented board members of a prominent political organization in depositions before multiple House committees. </li><li>Represented a witness in a high-profile House committee investigation, including a transcribed interview subject to intense media scrutiny. </li><li>Provided proactive congressional and federal agency risk-mitigation counseling to clients in the nonprofit, financial services, technology, and energy sectors. </li><li>Represented a global fintech company in multiple House committee investigations, including subpoena responses and document productions. </li><li>Represented a higher education institution in a multi-year House committee investigation. </li><li>Represented a media services company in a congressional inquiry concerning a significant government contract. </li><li>Counseled multiple companies preparing corporate executives for House and Senate testimony. </li><li>Represented a prominent private equity firm in a Senate committee investigation concerning the healthcare industry. </li></ul><ul><li>Advised a leading technology company in a sensitive House and Senate engagement. </li><li>Represented a leading technology company in a House investigation concerning artificial intelligence. </li><li>Counseled leading financial institutions in ESG-related congressional and state attorney general investigations. </li><li>Represented a global insurer in a Senate committee investigation concerning climate risk.</li></ul>

Kimberly Hamm

Carlos Felipe Uriarte, former Assistant Attorney General for the Office of Legislative Affairs at the Department of Justice (DOJ), is co-chair of Morrison Foerster’s Congressional Investigations practice.Carlos has seen congressional investigations from every side of the table—running them as a congressional investigator, managing the executive branch’s response as the DOJ’s chief liaison to Congress, and engaging with government regulators as a senior in-house compliance executive. He draws on that perspective to help clients anticipate where an inquiry is headed, protect their reputations, and manage parallel DOJ investigations, regulatory scrutiny, and enforcement risks. He represents companies and senior executives across financial services, artificial intelligence, technology, digital infrastructure, government contracts, and energy in DOJ and congressional investigations.Following his nomination by the president and unanimous confirmation by the Senate, Carlos served as Assistant Attorney General for the Office of Legislative Affairs from 2022 to 2025, leading a team of approximately 50 legal professionals responsible for all aspects of the DOJ’s critical and high-stakes relationship with Congress. A member of the Attorney General’s senior leadership team, Carlos set legislative strategy for the Department, regularly advised DOJ leadership on complex legal and policy objectives, and orchestrated the Department’s responses to major congressional oversight and investigative requests. In this role, Carlos testified before the House and Senate Judiciary Committees, met regularly with lawmakers on the Intelligence, Financial Services, Banking, and Commerce committees on both sides of the Capitol, and negotiated high-stakes matters directly with congressional leadership.Carlos has played a pivotal role in many of the highest profile congressional inquiries over the past two decades. His career in Congress included serving as Chief Counsel for Investigations on the House Select Subcommittee on the Coronavirus Crisis, as Counsel on the House Committee on Oversight and Government Reform, and as judiciary and oversight counsel to Representative Judy Chu. Carlos also held significant roles in the executive branch, where he served as Associate Deputy Attorney General in the Office of the Deputy Attorney General at the DOJ, and as Senior Counsel in the Office of the Secretary of the Interior. During law school, Carlos was a law clerk to Senate Judiciary Committee Chairman Arlen Specter.Carlos also brings an in-house perspective to every engagement, drawing on his experience building and leading internal compliance functions and engaging with government regulators. Before rejoining the DOJ in 2022, Carlos served as a senior compliance executive at a Fortune 100 financial institution and led the legal and regulatory teams at an innovative,  venture-backed, healthcare technology startup.Carlos clerked for the Honorable Juan R. Sánchez of the U.S. District Court for the Eastern District of Pennsylvania. He earned his B.A. magna cum laude from Washington University in St. Louis and his J.D. from the University of Pennsylvania Law School, where he was a James Wilson Fellow in Law and Technology.<h4>Representative Experience</h4><ul><li>Advised a global e-commerce and technology company in a House committee inquiry into its pricing practices.</li><li>Advises a global technology investment holding company on political and congressional risks.</li><li>Advised a leading AI developer in connection with congressional oversight and political risks of a confidential strategic transaction.</li><li>Represents a publicly traded critical minerals company in a House committee inquiry.</li><li>Advises a leading data analytics and AI software company in regard to recurring congressional scrutiny of its government contracts.</li><li>Represented a former senior White House official in a high-profile House oversight investigation into presidential decision-making and executive authority.</li><li>Represented a former cabinet-level Biden administration official in a Senate subcommittee inquiry concerning the prior administration.</li><li>Represents the co-founders of a leading political fundraising technology platform in a multi-committee House investigation.</li><li>Advises an international human rights organization in connection with congressional oversight, DOJ, and national-security-related risks facing global nonprofits.</li><li>Represented a media and advertising firm in parallel House and Senate inquiries into its widely publicized federal contracts.</li><li>Represents a global digital rights organization in a House Judiciary Committee investigation into alleged foreign influence on online content moderation.</li><li>Advises a nationwide nonprofit coalition in connection with developing its affirmative congressional strategy as nonprofits face escalating government scrutiny.</li><li>Advises a UK-headquartered AI infrastructure company in resolving its congressional and political risks tied to confidential cross-border data center investments.</li><li>Represents a multinational e-commerce platform in a bipartisan Senate inquiry into online marketplace compliance with ongoing counsel on mounting congressional scrutiny of consumer data and pricing practices across the sector.</li><li>Represented a key witness in a House Oversight Committee transcribed interview in a high-profile investigation of a prominent federal criminal matter.</li></ul>

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