Polls show Biden, Sanders, Warren, Buttigieg in tight race in Iowa

Democrats will hold 2020’s first presidential debate Tuesday night in Iowa with less than three weeks left until voters make their picks in the state’s caucuses. The latest polls in the state show a close race between Joe Biden, Bernie Sanders, Elizabeth Warren and Pete Buttigieg. CBSN political reporter Caitlin Huey-Burns and CBS News political contributors Antjuan Seawright and Leslie Sanchez joined CBSN with more on what to watch for in tonight’s debate. Source