Former Secretary of State Hillary Clinton accused President Trump of selling out U.S. diplomats amid accusations that the president delayed military aid to Ukraine in an attempt to force an investigation into former Vice President Joe Biden, who currently leads the pack of 2020 Democrats.

Clinton gave a speech at an awards ceremony for women in U.S. foreign service at Georgetown University on Friday. She used the opportunity to take a few shots at Trump, who beat her in the 2016 U.S. presidential election.