They've got muck; we've got rakes. TPM Muckraker
"Definitely they asked about the relationship between the Crist campaign and the party, relative to the co-mingling of funds. ... I believe they're after any federal election law violations, tax avoidance issues, and criminal fraud."
It was no secret [GOP chair Jim] Greer was aggressively promoting Crist's campaign, but it could be a violation of federal election law subject to civil penalties for the state party to pay for a federal candidate's expenses.
The whole story, which also details Greer's liberal use of a GOP credit card, is here.