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 on Saturday blasted Democrats for pushing to investigate his finances while swiping at House Intelligence Committee Chairman 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.), calling him "little shifty Schiff."

“There’s no collusion, so now they go and morph into ‘let’s inspect every deal he’s ever done,’ ” he said to a crowd at the Conservative Political Action Conference (CPAC). “These people are sick.”

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“I saw little shifty Schiff yesterday,” Trump added. “He went into a meeting and he said, ‘We’re going to look into his finances.’ I said ‘Where did that come from? He always talked about Russia.’ ”

Schiff last month announced a sweeping probe into Trump's finances and potential ties to Russia. Trump afterward condemned Schiff as a "political hack," but Schiff defended the investigation as "meaningful oversight."

Democrats also questioned Trump's former attorney Michael Cohen on the president's finances at a hearing on Wednesday. Cohen told Rep. Alexandria Ocasio-Cortez Alexandria Ocasio-CortezHouse passes bill to avert shutdown Trump attacks Omar for criticizing US: 'How did you do where you came from?' The Memo: Dems face balancing act on SCOTUS fight MORE (D-N.Y.) that Trump purposefully inflated his assets for insurance reasons.

CPAC is an annual gathering of conservatives with high-profile speakers. It is attended largely by conservative university students.