Rep. Mike Pompeo was nominated to be CIA director, but his confirmation hearing has been pushed to Thursday. (Jacquelyn Martin/AP)

Senators have postponed by a day the confirmation hearing for Rep. Mike Pompeo to serve as CIA director, Senate aides said.

Pompeo (R-Kan.) will now meet with the Senate Intelligence Committee on Thursday, moving the hearing from Wednesday, a day that was initially set to be packed with five simultaneous confirmation hearings.

Reasons for the delay were not clear early Tuesday, but Democratic aides said that pressure by Minority Leader Charles E. Schumer (D-N.Y.) to spread out the hearings appeared to be working.

Republican aides on the committee confirmed that the hearing was postponed until Thursday.

A federal ethics office reviewing the billions of dollars of wealth amassed by DeVos and other Cabinet nominees for President-elect Donald Trump under tight deadlines has put strain on investigators.

Given that pressure, the Senate Committee on Health, Education, Labor and Pensions announced Monday that it has postponed a confirmation hearing for DeVos to serve as education secretary until next Tuesday.

That leaves just three hearings now on Wednesday: for Rex Tillerson to serve as secretary of state, Elaine Chao to serve as transportation secretary and the second day of hearings to consider Sen. Jeff Sessions (R-Ala.) as attorney general.