FILE - In this March 8, 2012 file photo, Sen. Barbara Mikulski, D-Md. speaks on Capitol Hill in Washington. President Barack Obama and his allies in the Senate pushed Tuesday for a bill that calls for equal pay in the workplace, an election-year effort to merge political appeals to women with the No. 1 concern for all voters: the cash in their wallets on the heels of recession. (AP Photo/J. Scott Applewhite, File)