Doing the Delegate Math

The GOP primary isn't over yet and at the end of the day, it comes down to the magic number—1,144. Newsweek & The Daily Beast's John Avlon interviews Jeff Berman, author of 'The Magic Number: Inside Obama's Chase for the Presidential Nomination,' for a closer look at how the coveted digits are ruling the Republican race.

03.21.12 9:30 PM ET