Patrick Joseph "Pat" Toomey, Sr. (born November 17, 1961) is an American politician. He was a Republican member of the U.S. House of Representatives from Pennsylvania, representing the Lehigh Valley-based 15th congressional district from January 1999 to January 2005, when he retired after running for a seat in the United States Senate. From 2005 to 2009. HARRISBURG, Pa. — Pat Toomey, who as a little-known congressman nearly defeated Sen. Arlen Specter in the 2004 primary, announced Wednesday that he will mount another challenge when Specter seeks the Republican nomination for a sixth term next year. http://www.toomeyforsenate.com/site/c.nkLVJ6MMKrH/b.5302129/k.953F/The_Official_Campaign_Website_for_Pat_Toomey_for_US_Senate.htm