Sectors
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Hillary A. Leffue

Associate

Hillary A. Leffue

Associate

Hillary Leffue represents companies and individuals in government enforcement matters and international disputes, drawing on nearly a decade of operations experience with an international nonprofit organization in the Middle East, France, and the United States. Her background navigating cross-cultural environments gives her unique insight into the complexities of global legal matters, which she applies to helping clients achieve practical, business-driven solutions.

Government Enforcement and Investigations
Hillary conducts domestic and cross-border investigations resulting from internal reporting or in connection with enforcement actions by the U.S. Department of Justice and other state and federal agencies. She advises clients on matters involving:

  • Workplace immigration enforcement
  • SEC/DOJ securities issues
  • The Foreign Corrupt Practices Act (FCPA)
  • The False Claims Act (FCA)
  • Workplace misconduct
  • State enforcement actions

She also assists companies in conducting risk assessments and designing compliance programs to minimize the risk of enforcement actions. In addition, she represents foreign and domestic companies before the Committee on Foreign Investment in the United States (CFIUS).

International Arbitration
Hillary represents clients in arbitral and litigation matters spanning multiple industries and jurisdictions. She has handled disputes involving breach of contract, intellectual property, shareholder disagreements, consumer protection claims, and fraud allegations. Her experience includes arbitration proceedings in multiple arbitral forums, addressing claims arising from cross-border disputes in the U.S., Asia, Europe, and Latin America.

Affiliations

  • Member, Government Enforcement Defense & Investigations Practice Group
  • Member, Business Litigation & Dispute Resolution Practice Group
  • Member, International Arbitration Team
February 27, 2026 Foley Viewpoints

What Every Multinational Should Know About… Managing the Aftermath of the Supreme Court’s IEEPA Tariff Decision (Part V)

Following the U.S. Supreme Court’s decision invalidating the IEEPA tariffs, attention is now shifting from whether the tariffs were...
February 27, 2026 Foley Viewpoints

What Every Multinational Should Know About… Managing the Aftermath of the Supreme Court’s IEEPA Tariff Decision (Part IV)

Following the U.S. Supreme Court’s decision invalidating the IEEPA tariffs, attention is now shifting from whether the tariffs were...
The facade of the United States Supreme Court building featuring tall columns and statues under a clear blue sky, symbolizing the authority that guides chicago lawyers and shapes intellectual property law.
February 25, 2026 Tariff & International Trade Resource

What Every Multinational Should Know About…Managing the Aftermath of the Supreme Court’s IEEPA Tariff Decision (Part III)

Importers of record need to take steps to ensure that they are best positioned to secure any refunds, while also ensuring that they are adapting to the new replacement tariffs. So, on the customs side, we recommend these steps for importers of record to handle these customs issues.
Front view of the United States Supreme Court building featuring tall columns, a wide staircase, and the inscription "EQUAL JUSTICE UNDER LAW" above the entrance—an iconic site for litigation support and landmark intellectual property law decisions.
February 24, 2026 Tariff & International Trade Resource

What Every Multinational Should Know About …The New Section 122 Tariffs and Preserving IEEPA Refund Rights

In the immediate aftermath of the U.S. Supreme Court’s decision invalidating tariffs imposed under the International Emergency Economic Powers Act (IEEPA), the Trump administration has moved quickly to replace those tariffs with a new across-the-board tariff under Section 122 of the Trade Act of 1974.
The facade of the United States Supreme Court building featuring tall columns and statues under a clear blue sky, symbolizing the authority that guides chicago lawyers and shapes intellectual property law.
February 24, 2026 Tariff & International Trade Resource

What Every Multinational Should Know About…Managing the Aftermath of the Supreme Court’s IEEPA Tariff Decision (Part II)

The importer of record is the entity that initially pays all tariffs and thus is the entity that would receive any IEEPA tariff refunds. Nonetheless, behind the scenes there often are a variety of mechanisms importers of record may have used to handle the often unexpected tariffs, including pushing back on suppliers for price concessions, using surcharges to pass along tariffs, or general price increases.
The image shows the facade of the United States Supreme Court building, featuring Corinthian columns and sculpted figures above the entrance—a symbol of justice often referenced by Chicago lawyers specializing in intellectual property law.
February 26, 2026 Events

Managing the Aftermath of the Supreme Court’s Historic IEEPA Tariff Decision

The Supreme Court’s decision striking down the IEEPA tariffs has put significant refund opportunities on the table — but those opportunities may be lost without immediate action. To help companies navigate these complex issues, the Foley International Trade and Supply Chain Teams are putting on a two-part webinar.