(CNN) - A watchdog group says it plans to ask authorities in Delaware to investigate Senate candidate Christine O'Donnell's finances.
At issue are more than $20,000 of spending in 2009 and 2010 that Citizens for Responsibility and Ethics in Washington claims was illegal.
"It turns out Miss O'Donnell has treated her campaign funds like they are her very own personal piggy bank. She's used that money to pay for things like her rent, for gas, meals and even a bowling outing. And that's just flat-out illegal," said Melanie Sloan, the group's executive director.