Cain, Paul, Romney, Gingrich in Dead Heat in Iowa

Herman Cain, Ron Paul, Mitt Romney and Newt Gingrich are in a dead heat as the top choices for Iowans likely to attend the Jan. 3 Republican presidential caucuses, according to a Bloomberg News poll. The poll shows Cain at 20 percent, Paul at 19 percent, Romney at 18 percent and Gingrich at 17 percent among the likely attendees. Hans Nichols reports on Bloomberg Television's "InsideTrack." Click here to watch the video