It was one year ago Friday that Republican Ted Cruz and Democrat Hillary Clinton won the 2016 Iowa caucuses. Iowa Democrats will be heading to their caucus sites a year from Sunday to select someone they want to face President Donald Trump in the 2020 election. IPR's Clay Masters spoke with Des Moines Register Chief Politics Reporter Brianne Pfannenstiel regarding her reporting about potential 2020 Democratic contenders working to beef up their Iowa campaigns.