Sen. Barbara Mikulski, D-Md., speaks at the Democratic National Convention last year in Charlotte, N.C. She's the first woman ever to chair the Senate Appropriations Committee.
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Senate Judiciary Committee Chairman Patrick Leahy holds a hearing on gun control on March 7. The committee has since passed two bills on guns that are headed to the full Senate.
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Jack Lew testifies before a House budget panel in 2011. The Senate Finance Committee is scheduled to consider Lew's nomination to be Treasury secretary on Wednesday.
J. Scott Applewhite/AP