Vice President Joe Biden, in his Constitutional role as president of the Senate, arrives at the Capitol to provide the tie-breaking vote, if needed, on a vote to extend broad tax cuts that will otherwise expire in January, in Washington, Wednesday, July 25, 2012. (AP Photo/J. Scott Applewhite)

Photo by: J. Scott Applewhite

Vice President Joe Biden, in his Constitutional role as president of the Senate, arrives at the Capitol to provide the tie-breaking vote, if needed, on a vote to extend broad tax cuts that will otherwise expire in January, in Washington, Wednesday, July 25, 2012. (AP Photo/J. Scott Applewhite)