Reid: Senate vote on Lew expected this week

GOP senators have questioned Lew's private-sector experience with both Citigroup and New York University, and the former White House chief of staff's role in previous fiscal negotiations.

But Lew's nomination has not sparked the kind of criticism that another of President Obama's high-profile nominees, Chuck HagelChuck HagelSpy agencies changed rules, making it easier to unmask members of Congress Pentagon withholding nuclear weapons inspection results: report Lobbying World MORE, has received. The Senate is expected to hold a procedural vote Tuesday on Hagel's nomination for Defense secretary.

Democrats have said that Lew has been exceedingly transparent during his nomination process, and believe he should be confirmed without issue.

Obama nominated Lew to replace Timothy Geithner, who left the Treasury Department in January.  

Sen. Orrin HatchOrrin HatchHatch urged Trump to ‘speak clearly’ against hate groups The Memo: Trump tries to quiet race storm Senators push FTC to finalize changes to contact lens rule MORE (Utah), the ranking Republican on the Finance panel, declined to say Monday how he would vote on Lew's nomination. 

But Hatch did say that, if Lew cleared the committee fairly easily on Tuesday, he didn't see any reason to slow walk the nomination.

"If he comes out of committee, I don't see any reason why anybody would want to continue to put it off," Hatch said. "I can't speak for all my colleagues. All I can say is, we'll see what happens in committee tomorrow."

Sen. Jeff SessionsJefferson (Jeff) SessionsFBI opens tip line requesting information on Charlottesville rally Sessions rails against Chicago during visit to Miami DOJ warrant of Trump resistance site triggers alarm MORE (R-Ala.), perhaps the chamber's most vocal critic of Lew, continued to blast the nomination on Monday, saying Lew did not have the "gravitas" to be a good Treasury secretary.

But Sessions would not say whether he would push to delay a full Senate vote on the nomination. 

This post was updated at 6:45 p.m.