A new CBS News poll shows a three-way tie among Democrats in Iowa with less than a month to go before the Iowa caucuses.
Former Vice President Joe Biden, former South Bend, Indiana mayor Pete Buttigieg and U.S. Senator Bernie Sanders are tied with 23-percent support.
They are followed by U.S. Senator Elizabeth Warren at 16-percent and U.S. Senator Amy Klobuchar of Minnesota with seven-percent.
The margin of error for the poll is 3.8 points. The Iowa caucuses will be held in four weeks.