Rick Santorum asked supporters to help pay off his campaign debt after he suspended his presidential campaign this afternoon.

"I am planning to do everything in my power to bring a change about in the White House," he wrote in a campaign email. "But our campaign has debt, and I cannot be free to focus on helping defeat him with this burden."

He added that his daughter, Bella, "has pneumonia, but like her Dad, she's a fighter." Santorum declared the presidential race "over" during an event in Gettysburg, Pa., today after spending the weekend in the hospital with his daughter.

Then-candidate Barack Obama helped Hillary Clinton pay down her debt, and encouraged his donors to help her as well, in 2008. It will be interesting to see if Santorum comes to some sort of agreement with Mitt Romney along those lines.