This Sunday on State of the Union

The Chairman of the Joint Chiefs of Staff says the push to topple Gadhafi is grinding to a stalemate; Defense Secretary Robert Gates says a stalemate is possible. So how much should the U.S. and NATO do? We’ll ask Sens. Joseph Lieberman and Lindsey Graham.

Then, former Under Secretary of State Nicholas Burns and former NATO Supreme Allied Commander Gen. George Joulwan (Ret.) on the impact the fighting might have on the region.