Senator Elizabeth Warren opens up to CBS News about her 2020 campaign
In the early voting states, Senator Elizabeth Warren leads in New Hampshire, while Senator Bernie Sanders leads in Nevada. Meanwhile, former vice president Joe Biden now clings to a narrow lead over Warren in a CBS News/YouGov Tracker estimate of convention delegates -- the only count that ultimately matters -- with an estimated 600 delegates of all delegates available through Super Tuesday, to Warren's 545. CBSN political reporter Caitlin Huey-Burns sits down with Warren to discuss why she is gaining in the polls.