U.S. News

Rudy Giuliani, Giuliani Partners, discusses Mitt Romney's flip-flop on issues, and why he has not yet endorsed the GOP front-runner, saying the vitriolic nature of the campaign is harmful.

Medical device maker, Abiomed's CEO, Michael Minogue, discusses his company's earnings beat, and whether the ultra expensive stock, selling for 5.8 times next year's sales, still has room to run, with Mad Money's Jim Cramer.

Robert Iger, Walt Disney president & CEO, explains how the current quarter is trending in ad sales and parks bookings, with CNBC's Julia Boorstin and Maria Bartiromo.

Rudy Giuliani, Giuliani Partners, discusses Mitt Romney's flip-flop on issues, and why he has not yet endorsed the GOP front-runner, saying the vitriolic nature of the campaign is harmful.

Robert Costa, National Review, reports on the GOP presidential race; Rick Santorum's evangelical appeal; and Romney's tough night in Colorado.

The SEC is putting the finishing touches on a draft of new regulations, but will more regulations choke business and strangle investment? David Hirschmann, US Chamber of Commerce, weighs in.