(CNN) - A day after denying any improprieties with his use of a Florida Republican Party credit card, Senate candidate Marco Rubio says he has discovered he erroneously double-billed both the party and the state of Florida for several flights while he was House Speaker.
Rubio, who is currently battling Gov. Charlie Crist for the GOP Senate nomination, said in a statement that eight official state business flights, totaling $3,000, had inadvertently been charged to both the state and the party.
"Billing the Party was a mistake which needs to be fixed," said Rubio in a statement. "So, out of an abundance of caution, I am personally reimbursing the Party for the cost of all 8 flights."
The Florida House Speaker is eligible for complete reimbursement for any travel related to official state duties. Rubio's campaign notes that when he was Speaker he saved taxpayers $32,000 by only charging the state for eight flights out of hundreds taken.