Per NYT The Caucus:
Senator Arlen Specter of Pennsylvania said on Tuesday he would switch to the Democratic party, presenting Democrats with a possible 60th vote and the power to break Senate filibusters as they try to advance the Obama administration’s new agenda.
In a statement issued about noon as the Capitol was digesting the stunning turn of events, Mr. Specter said he had concluded that his party had moved too far to the right, a fact demonstrated by the migration of 200,000 Pennsylvania Republicans to the Democratic Party.
“I now find my political philosophy more in line with Democrats than Republicans,” Mr. Specter said, acknowledging that his decision was certain to disappoint colleagues and supporters.
Seat Al Franken and Dems have filibuster proof 60. Huge news. More to come.