Sen. Jim Inhofe, R-Tulsa, who is up for re-election in 2014, had $659,217 in his account when the year began.
Rep. Dan Boren, a Democrat whose retirement last year paved the way for Mullin's victory in eastern Oklahoma, still has $518,705 in his campaign account, according to a report he filed with the FEC.
Boren, who is working for the Chickasaw Nation and has said he doesn't envision running for federal office again, would not be able to use the money to seek state elected office, should he decide to do so.
However, he can donate the money, and he has begun. He gave $150,000 to Seminole State College for a building to house student government offices. He also gave $2,000 in December to Sullivan to help the former lawmaker retire his debt.
Sullivan, a Tulsa Republican who represented the 1st District for a decade, had $11,725 in debts and about $5,000 in his account at the end of December. He received more than $18,000 in donations in December to help with his debt, including ones from American Airlines and the National Air Traffic Controllers Association.