Rep. Adam Schiff Adam Bennett SchiffChris Matthews ripped for complimenting Trump's 'true presidential behavior' on Ginsburg Trump casts doubt on Ginsburg statement, wonders if it was written by Schiff, Pelosi or Schumer Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence MORE (D-Calif.) said early Thursday that Speaker Paul Ryan Paul Davis RyanKenosha will be a good bellwether in 2020 At indoor rally, Pence says election runs through Wisconsin Juan Williams: Breaking down the debates MORE (R-Wis.) is leaving Congress in part because GOP leadership has reduced Washington to "shambles."

"I think part of the reason he's leaving is the way the GOP has run Washington over the years. It's in complete shambles," Schiff said on CNN's "New Day."

The ranking Democrat on the House Intelligence Committee added that pressure to "basically end the Russia investigation" was too much for Ryan to handle.

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"It's dragging the GOP down, and they'll pay for it in the midterms," Schiff says.

Ryan announced Wednesday that he would not seek reelection in November, throwing the House GOP leadership into question.

The Wisconsin Republican was facing a particularly well-funded Democratic opponent in Randy Bryce, a union ironworker who declared his candidacy last year.

President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE praised the House leader on Wednesday after his announcement.

"Speaker Paul Ryan is a truly good man, and while he will not be running for reelection, he leaves behind a legacy of achievement no one can question," the president wrote on Twitter.