March 30, 2007 -
There are 33 U.S. Senate seats up for grabs in 2008 -- 21 currently held by Republicans, 12 by Democrats. All but one of 13 Southern states (Florida being the exception) will choose a new senator in 2008.
Nationally, over a dozen likely won't be nail-biters, but by some estimates up to 20 could be competitive. Which Southern seats will be in play?