President Donald Trump announced Wednesday he plans to nominate Christopher A. Wray, the former assistant attorney general in charge of the Justice Department's criminal division, to be the next FBI director. Trump's announcement comes one day before former FBI Director James Comey, whom Trump fired last month, is set to testify in a bombshell hearing before the Senate. "I will be nominating Christopher A. Wray, a man of impeccable credentials, to be the new Director of the FBI. Details to follow," Trump tweeted Wednesday morning.