center. jenna: they better get working they only have a couple of hours before they need the stage tonight. there is quite a line up of people talking, marco rubio, governor romney, and the mystery guest, we don't know who that is. maybe james rosen knows something about that. last night was paul ryan's big moment in the spotlight accepting the party nomination for vice president. it didn't take long for democrats to tear apart what he had to say. tis the season for that on both sites. james rosen is live in tampa with a fact check on all of this and maybe, maybe a scoop on the mystery guest. james. >> reporter: maybe a twaoe tweese at the end of the hit. jim messina wasn't mincing words at 4:37am today when he blasted out a fundraising email in which he accused congressman ryan of having quote lied about medicare and the stimulus and the