FILE - Senate HELP Committee Chair Sen. Bernie Sanders, I-Vt., questions Moderna CEO and Director Stephane Bancel during a Senate HELP Committee hearing on the price of the COVID-19 vaccine, Wednesday, March 22, 2023, on Capitol Hill in Washington. Sanders, President Joe Biden's chief rival in the 2020 primary, told The Associated Press just hours after Biden announced that he was endorsing the president and encouraged other progressive leaders to do so as well. (AP Photo/Jacquelyn Martin, File) file photo
