bill schulz, joe devito, michael money gnaw han. that's it for me. i will see you next time. tomor. >> bret: the next phase of the republican presidential campaign begins in just hours, live from michigan, this is special report. >> . >> good evening, i'm bret baier, we're live in birmingham, michigan, about 20 miles north of detroit. after a three week break the republican presidential campaign enters a crucial stage tomorrow. voters in arizona and here in michigan will begin an eight day stretch in which more than 500 convention delegates are at stake. that's about half the total it it it takes to win the nomination. and chief political correspondent carl cameron starts us off tonight. >> facing a dead heat in the polls and a must-win tomorrow in his native state of michigan, mitt romney attacked rick santorum not able, with a line he's reserved for president obama. >> he's a nice guy, but never had a job in the private sector, worked as a lobbyist, elected official, that's fine. if the issue of the day is the economy, i think to create jobs, it helps to have a guy as presi