Republicans had hoped Mack would benefit from his famous name: his father, former Sen. Connie Mack, served two terms in the Senate and appeared in some of Mack's television ads. Mack linked Nelson to Obama, often describing him as a "lockstep liberal." Early in the cycle, some Republicans hoped Nelson's voting record would leave him vulnerable. But the senator now has won reelection twice with relative ease. He defeated former Rep. Katherine Harris in 2006.