Candidates making last minute push before Iowa caucuses

With less than 48 hours until the first votes are cast in the 2016 campaign, candidates held rallies across the state. Major Garrett has more.
2016 presidential candidates fan out across Iowa in a last minute search for voters and electoral success. Caucus Countdown series: This three part series .
U.S. presidential contenders from both major parties are making a furious last-minute push for votes in Iowa in advance of the February 1st party caucuses.
Republican voters in Iowa will kick off the 2012 U.S. presidential election campaign Tuesday with caucus voting, the first step in choosing a candidate to run .