Candidates Try to Close the Deal as Caucuses Near

With five days to go before the Iowa caucus, Mitt Romney is stepping up his efforts there, while Michele Bachmann struggles to recover from the loss of her top advisor in the state, who jumped ship to support Ron Paul. Candidates continue to move up and down in the latest polls, with Romney now in a statistical tie with Texas Congressman Ron Paul. Donna Hoffman is Professor of Political Science at the University of Northern Iowa.