Joe Biden now has secured more than half of delegates in the Democratic primary contest, making a Bernie Sanders comeback increasingly unlikely. Biden won primaries in Florida, Illinois, and Arizona on Tuesday night. Sanders gave a speech before voting had ended without mentioning the election at all. Instead, he used the address to debut his proposal to combat the economic impact of the coronavirus. This episode: congressional correspondent Susan Davis, campaign correspondents Asma Khalid and Scott Detrow, and voting reporter Miles Parks.