The Drive: Romney, Paul or Santorum in Iowa?

In the latest episode of "The Drive," CBSNews.com senior political reporter Brian Montopoli is in Iowa where the first votes in the 2012 presidential campaign will be cast in a just few hours.

Can Mitt Romney maintain his steady lead over surging Rick Santorum and fan-favorite Ron Paul? Will Michele Bachmann or Rick Perry, vying just not to finish last, be forced to end their runs after Tuesday? And where will the roller coaster Newt Gingrich campaign place?

Check out "The Drive" on the road in the video to the left.