Veteran GOP Senator Arlen Specter of Pennsylvania enters the Diplomatic Room at the White House to make a statement with President Barack Obama about his surprise switch to the Democratic Party in Washington, Wednesday, April 29, 2009. AP Photo logo AP Photo 34 months ago

Veteran GOP Senator Arlen Specter of Pennsylvania enters the Diplomatic Room at the White House to make a statement with President Barack Obama about his surprise switch to the Democratic Party in Washington, Wednesday, April 29, 2009.