short feature from PBS Newshour explains how. The short article explains how the caucus first started, how they work for the Republicans and Democrats, and the impact that night's results could have. Also addressed: the Iowa weather and what that might mean for turnout.
This year's Iowa Caucus is on Mon., 1 Feb., and begin at 7pm CST. Expect to see live coverage on CSPAN and of course extended coverage and commentary on all the networks.