White House Counsel William Scharf warned Rep. Robert Garcia, the top Democrat on the House Oversight Committee, that congressional investigations and subpoenas must stay within constitutional limits. In a letter dated Nov. 9, Scharf said some conduct could potentially amount to a crime. Garcia, who is expected to lead the committee if Democrats take control of the House next year, replied that the warning suggested President Trump had “something to hide.”
Legal specialists from across the political spectrum said the White House can challenge particular subpoenas, but pursuing criminal charges over Garcia’s oversight work would face substantial hurdles.
“The administration can assert privileges, negotiate over requests and challenge particular subpoenas through the appropriate legal process,” said Ilya Shapiro, director of constitutional studies at the Manhattan Institute. But, he added, criminal prosecutions are “a very different animal” and face a higher bar.
Congressional inquiries also receive protection under the Constitution’s Speech or Debate Clause. The Supreme Court has said the clause protects lawmakers from judicial interference when their investigative work is part of legitimate legislative activity.
Shapiro said Democrats who promise broad, indiscriminate subpoenas could invite legal challenges. Committees must stay within their jurisdiction, respect witnesses’ constitutional rights and tie investigations to a valid legislative purpose, he said.
Garcia argues that his oversight plans fall squarely within Congress’s authority. In a statement, he said that power comes from Article I of the Constitution, not from the White House, and is part of Congress’s ability to legislate.
Garcia also said voters had given Democrats a mandate to address corruption and abuse. He accused the Trump administration of using government power to threaten Congress, adding that his party would not be deterred.
Scharf’s letter came a week after Democratic lawmakers called publicly for subpoenas and impeachment proceedings involving Trump administration officials. Their statements followed major Republican losses in the 2026 midterm elections. Some observers noted that Republicans had used similar language when seeking investigations of Democratic officials.
Hans von Spakovsky, a constitutional law expert and senior legal fellow at Advancing American Freedom, agreed that congressional investigations cannot be driven by personal animus. He cited the Supreme Court’s decision in Watkins v. United States, which held that investigations lacking a legitimate legislative purpose and aimed only at harassment or obtaining private information exceed Congress’s constitutional authority.
Von Spakovsky questioned, however, what criminal law could apply. Laws addressing harassment of federal officials generally require physical threats, he said. The Watkins ruling, he added, means courts cannot enforce congressional subpoenas issued as part of an improper investigation.
Will Chamberlain, senior counsel at the Article III Project, said Scharf’s letter does not claim that oversight itself is a crime. Rather, it argues that congressional procedures do not protect conduct that would otherwise be criminal. Chamberlain said a conspiracy to intimidate federal officials could potentially fall under federal law, but that official investigative work would not be prosecutable. He said evidence such as threats or public statements might be relevant to a separate intimidation case.
Molly Nixon, a senior fellow at the Cato Institute, said courts do require congressional investigations to serve a legitimate legislative purpose, although she believes the constitutional boundaries are less settled than Scharf suggested. She also questioned the letter’s suggestion that the conduct could be criminal.
In his letter, Scharf accused Democratic lawmakers of threatening to use subpoenas to harass or deter administration officials from serving. He said compulsory process is available to Congress for oversight, not for indiscriminate use, and argued that public comments about targeting officials could show that investigations are intended to intimidate rather than serve a legislative purpose.
Scharf further warned that threats aimed at driving officials from public service, or investigative procedures intended to frighten recipients, could cross into criminal conduct. He said subpoenas issued unlawfully with the intent to deprive people of constitutional rights might also merit investigation.
Devon Ombres, senior director for courts and legal policy at the Center for American Progress, said he saw no reasonable basis for arguing that Congress cannot carry out its oversight responsibilities and doubted that a criminal statute would apply. He said the Justice Department might try to find a legal basis, but in his view Scharf’s warning lacked legal support.
Ombres nevertheless expects the Trump administration to try to block subpoenas through litigation. “The White House and the DOJ” will throw everything they can at them, he said.
