Math Riewp News Today

>> reporter: any time. >> mitt romney says that the delegate math riewp proves he is the only one who can win. but rick santorum doesnt think mitt can close the deal. senator santorum is live on the campaign trail, coming up. a new documentary calls for black americans to join the conservative movement. >> when people find out im a conservative, i get a lot of hate mail and i get called a sellout and uncle tom. we will talk to the man behind this documentary, a little bit later in the show. ng t...

>> reporter: romney has no appearances but hes hoping to pick up mississippi in tuesdays voting. hes way ahead in the delegate count with twice as many as santorum. all three candidates with a chance on tuesday, all stepping up their television advertising in these final days before the votes in alabama and mississippi, shannon. >> steve, thank you very much. >> you bet. so does rick santorum think that tuesdays primaries are a must-win for him? were going to ask him at 1:30 live, plus, hes go...