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 HagelCharles (Chuck) Timothy HagelAlmost 100 former officials, members of Congress urge Senate action on election security GOP Senate candidate said Republicans have 'dual loyalties' to Israel White House aide moves to lobbying firm 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.

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

Sen. Orrin HatchOrrin Grant HatchTrump awards Medal of Freedom to racing industry icon Roger Penske Trump holds more Medal of Freedom ceremonies than predecessors but awards fewer medals Trump to award Medal of Freedom to former Attorney General Edwin Meese 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) Beauregard SessionsWhite House backs Stephen Miller amid white nationalist allegations The Hill's Campaign Report: Late bids surprise 2020 Democratic field Sessions vows to 'work for' Trump endorsement 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.