"I have decided to run for re-election in 2010 in the Democratic primary. I am ready, willing and anxious to take on all comers and have my candidacy for re-election determined in a general election. Since my election in 1980, as part of the Reagan Big Tent, the Republican Party has moved far to the right. Last year, more than 200,000 Republicans in Pennsylvania changed their registration to become Democrats. I now find my political philosophy more in line with Democrats than Republicans."
—Pennsylvania Senator Arlen Specter announced today that he's switching parties. This will give the Democrats a filibuster-proof majority in the Senate, assuming Al Franken is eventually seated as Minnesota's senator. President Obama called Specter to say the Democrats "are thrilled to have you."