Democratic candidates take aim at frontrunner Elizabeth Warren

At the Democratic presidential debate Tuesday night, all 12 candidates were in agreement on one topic: impeaching President Trump. Sen. Elizabeth Warren, the fastest-rising candidate in the polls, faced most of the questions from 11 other hopefuls. Meanwhile, former Vice President Joe Biden tried once again to move the discussion away from his son, Hunter, and his work in Ukraine. Ed O’Keefe reports.