The White House’s top lawyer is raising the possibility of criminal investigations into House Democrats, arguing that the inquiries they plan to open into President Trump and administration officials could themselves break the law.

Will Scharf, the White House counsel, made the warning in a letter dated Monday to Rep. Robert Garcia (D-Long Beach), who is in line to lead the House Committee on Oversight and Government Reform, when Democrats take control of the chamber in January.

“We are monitoring the abusive and capricious threats that are now proliferating from Democrat legislators who seek to abuse the legislative process to intimidate and to interfere with the lawful functioning of government,” Scharf wrote.

Scharf cited recent statements by Democrats in news reports about their intent to investigate alleged corrupt practices by administration officials, and wrote that Congress needs to “identify a legitimate purpose underlying its investigative acts.” Otherwise, he argued, a “process designed merely to abuse or instill fear in the recipient may cross the line into blatant criminality.”