According to a new CBS Battleground Tracker Poll, across the 18 early primary and caucus states through Super Tuesday, Democratic voters’ top pick continues to swing back and forth between Joe Biden and Elizabeth Warren, with neither able to break away. Warren has dipped after having led last month and Biden has regained the edge. He now has 29% support, followed closely by Warren at 26%. Bernie Sanders is holding strong in third place (18%). Deputy Director of Surveys Jennifer DePinto joins the Morning Show to elaborate on the CBS Battleground Poll