Geoffrey Berman, U.S. attorney for the Southern District of New York, speaks during a news conference in New York, U.S., on Thursday, Oct. 10, 2019. Ukraine-born ally of Rudy Giuliani was accused by U.S. prosecutors of skirting campaign contribution limits as part of a scheme to oust the American ambassador to Ukraine, an episode now under scrutiny by a Congressional committee weighing the impeachment of President Donald Trump. Photographer: Peter Foley/Bloomberg via Getty Images