CBS News Poll: Sanders, Biden, Buttigieg tied in Iowa With just under a month before the Iowa caucuses, a new CBS News poll suggests there is a 3-way tie in the "Hawkeye State" between Bernie Sanders, Joe Biden, and Pete Buttigieg. In New Hampshire, Bernie Sanders continues to gain momentum. CBS News campaign reporters Nicole Sganga and Musadiq Bidar join CBSN's Laura Podesta for a closer look at where things stand.