After Sanders victory in Nevada, rivals insist they're still in the running

After Bernie Sanders cemented his standing as the undisputed frontrunner in the Democratic presidential primary with a resounding win in the Nevada caucuses Saturday, his rivals for the nomination were left to explain to their supporters how they could stop him. Incomplete results showed Sanders with a better than two-to-one margin over Joe Biden, with Pete Buttigieg close behind in third place, followed by Elizabeth Warren and Amy Klobuchar.