Senator Barbara Mikulski (D-Md.) arrives for a closed door Senate Select Committee on Intelligence hearing to discuss the September 11, 2012 attack on the U.S. Consulate in Benghazi, Libya, and the intelligence and security situation in other Arab Spring countries at the Hart Senate Office Building, Washington, D.C., Thursday, November 15, 2012. (Andrew Harnik/The Washington Times)
Sen. Barbara Mikulski, D-Md. leads an address by the Women of the Senate at the Democratic National Convention at the Time Warner Arena in Charlotte, N.C., on Wednesday, September 5, 2012. (Andrew Geraci/ The Washington Times)
Sen. Barbara Mikulski, D-Md. leads an address by the Women of the Senate at the Democratic National Convention at the Time Warner Arena in Charlotte, N.C., on Wednesday, September 5, 2012. (Andrew Geraci/ The Washington Times)
**FILE** Sen. Barbara Mikulski, Maryland Democrat, speaks March 8, 2012, on Capitol Hill in Washington. (Associated Press)
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)
**FILE** Sen. Barbara Mikulski, Maryland Democrat, speaks March 8, 2012, on Capitol Hill in Washington. (Associated Press)
Sen. Barbara Mikulski, 75, a Maryland Democrat, set a record on Saturday by becoming the longest-serving female member of Congress. (Associated Press)
Sen. Barbara Mikulski, Maryland Democrat, will become the longest-serving woman in the U.S. Senate when sworn in later this month. (Associated Press)
