CNN

Watch Frank Sesno's latest "What if ?" report about a possible solution to the crowded 2008 presidential primary calendar.

WASHINGTON (CNN) - What if the United States had a regional, rotating calendar for holding presidential primaries? Frank Sesno reports on a proposal by three U.S. senators to do just that.

Click here to see CNN's new political portal: CNNPolitics.com

Watch this week’s “What If?” segment.

WASHINGTON (CNN) – What if the U.S. were to pull its troops completely out of Iraq?

That’s the question on many minds especially as a slew of Republican senators begin questioning the White House about U.S. involvement. Some experts warn that chaos would ensue while others say that Iraq is already a lost cause.

CNN Special Correspondent Frank Sesno examines what might happen if the U.S. pulled out of Iraq today.