President Trump on Monday accused Rep. Adam Schiff, the ranking Democrat on the House Intelligence Committee, of leaking confidential information.

"Little Adam Schiff, who is desperate to run for higher office, is one of the biggest liars and leakers in Washington, right up there with Comey, Warner, Brennan and Clapper! Adam leaves closed committee hearings to illegally leak confidential information. Must be stopped!" Trump tweeted Monday morning.

The California Democrat has led a counterattack on Republicans after House Intelligence Committee Chairman Devin Nunes released a memo that alleged FBI and Justice Department officials were targeting Trump's campaign. Schiff cited classified Foreign Intelligence Surveillance Court filings in his rebuttal, and has put together a Democratic memo to rebut Nunes.

“The Republican document mischaracterizes highly sensitive classified information that few Members of Congress have seen, and which Chairman Nunes himself chose not to review,” Schiff wrote last week.

On CNN, Rep. Karen Bass, D-Calif., called Trump's comments an "embarrassment."

"This is the president of the United States. This is just an embarrassment," she said. "It's an embarrassment on the international stage."

The House Intelligence Committee is expected to vote Monday on whether to release the Democratic memo.