Biden and Buttigieg look to cut into each other's polling leads in Iowa and South Carolina

05:06

Joe Biden sets off on his 'No Malarkey' bus tour in Iowa as he slips to fourth in the state in recent polls, as Pete Buttigieg makes his way to South Carolina in an attempt to appeal to the black voters who will help decide the 'First in the South' primary. Charlie Sykes and Joe Crowley join Andrea Mitchell to discuss the latest from the campaign trail.