Democratic 2020 U.S. presidential candidate Joe Biden attends Nevada Caucus precinct captain training...
Democratic 2020 U.S. presidential candidate and former Vice President Joe Biden talks with and takes pictures with union supporters with the Trump Tower behind him on the Las Vegas skyline as he attends Nevada Caucus precinct captain training with the Amalgamated Transit Union (ATU) and other union members in Las Vegas, Nevada, U.S. February 21, 2020. REUTERS/Patrick Fallon