There are 33 seats up for grabs. A lot of people retiring, particularly Dems and Independents.
http://en.wikipedia.org/wiki/United_Sta ... ions,_2012
Check it out. Lets see what people think.
Right now I think Elizabeth Warren sails into Ted Kennedy's seat. And in New Mexico it's Martin Heinrich vs Heather Wilson or maybe Steve Pearce.
Otherwise I don't really have an opinion on other races yet.