A White House spokesperson confirms that President Obama will head to Pennsylvania next month to raise money for Sen. Arlen Specter (D-Pa.). The Philadelphia Daily News reported this morning that invitations to the Sept. 15 event were sent out by Comcast Executive Vice President David L. Cohen.

The event that Mayor Nutter, Gov. Rendell and Specter will attend features a $1,000 cocktail reception, another VIP reception for those who raise at least $10,000, and a dinner for which "an individual must write (not raise) a minimum of $10,000 or raise $50,000" to attend, Cohen's note says. The missive asks guests to make checks payable to Pennsylvania Senate Victory 2010, and promises that all dinner guests will have a picture taken with Obama and Specter.

Meanwhile, Vice President Biden is scheduled to visit Florida this week for an event to promote the Recovery Act. While in the state, he'll also be raising money for two potentially vulnerable Democrats, Reps. Alan Grayson and Suzanne Kosmas (D). On Thursday, he'll be in Chicago on Aug. 20 to headline a fundraiser for Rep. Debbie Halvorson (D-Ill.)