Sen. Joe Manchin (D-W.V.) (Reuters Photo) Sen. Joe Manchin (D-W.Va.) (Reuters)

Attorney General Eric Holder should at least consider resigning, Sen. Joe Manchin (D-W.Va.) said in an interview airing on Bloomberg Television this weekend.

Asked about Holder, he said: “Whenever you feel that you have lost your effectiveness or may be losing your effectiveness to the detriment of the job that you do ... you have to evaluate that and make a decision. And I think we’re at the time now where decisions have to be made.”

Manchin said he was troubled by the reports on the government's secret surveillance of phone and internet data, and thought there should be a White House Office of Civil Liberties to consult on these issues. (There is a Privacy and Civil Liberties Oversight Board, but it has a troubled history.)

The conservative Democrat is a frequent critic of the Obama administration; last year he declined to say whether or not he supported the president's reelection.

Several Republicans have called on Holder to resign. The attorney general has brushed aside those calls, saying that if he does step down it will be from "fatigue."