The final pre-caucus GOP rumble is on! As I laid out in my preview post, some candidates and jockeying for position, others are seeking to maintain momentum, and others are fighting for their political lives. Tonight may prove pivotal -- and if anyone tells you they know how Iowa will ultimately shake out, don't believe them for a second. This races remains wide open. As the bright lights of prime-time shine, who's up and who's down? Follow the Townhall/Hot Air team's live coverage below, and mark your running scorecard in the comments section:
Stick around: My assessment of the debate's winners and losers will be posted just as soon as I can get it done.