CABRERA: Top of the hour. I'm Ana Cabrera, in for Brooke. Thank you for joining us. Moments ago, major decision. The White House announcing it will allow fired FBI Director James Comey to testify. Will not try to block the testimony. Once again, the administration also forced to defend President Trump's comments on Twitter. This time his tweets slammed the mayor of London just two days after a terror attack in that city. More tweets from the president could end up undermining his own agenda on the travel ban. We'll dig into all of that. But first, to the White House and the big announcement on Comey. He's expected to testify before the Senate Intelligence Committee this Thursday. Comey is expected to speak about how he felt pressured by the president to drop the case against one of his top aides, Michael Flynn. Let's get right out to CNN senior White House correspondent, Jim Acosta. Jim, this is significant. President Trump will not invoke executive privilege.</s>JIM ACOSTA, CNN SENIOR WHITE HOUSE CORRESPONDENT: That's right, Ana. This would have set up a huge clash in Washington between the president and Congress had he tried to invoke executive privilege and block James Comey from testifying on Thursday. But Sarah Huckabee Sanders, filling in for Sean Spicer today in the White House briefing, made it clear, almost came into the briefing armed with that news nugget to hand out to everybody that, no, the president has decided he's not going to do that. Of course, that was not the end of some pretty tough questions for Sanders today. Obviously, the president's tweet storm that he's been on for the last 24r hours or so in the aftermath of the attack --
White House: Trump Will Not Stop Comey from Testifying