Sheldon Adelson zeroes in on Senate race

The billionaire's checkbook, it seems, poses a threat to Democratic Rep. Shelley Berkley, who's running for the Nevada Senate seat held by Republican Dean Heller. And unlike in the GOP presidential primary, where Adelson's motivations were driven by his friendship with Gingrich, his interest in the highly competitive Senate race is rooted in his public fallout with the Las Vegas congresswoman.