policy. carried out in front of the whole world. and fully, fully embraced by the international community of democracy. we weren't pressuring ukraine to get rid of a top prosecutor, we were pursuing ukraine to replace a weak prosecutor who wouldn't do his job with someone at the time we hoped would finally crack down on corruption in ukraine. that's what it was about. trump on the other hand was secretly putting at risk our national security by pursuing a personal political vendetta against me, because -- >> joining us professor of political science of brown university and author of the book "the oath and the office," corey brettthis sh nider, great to have you back with us this morning. >> good morning. >> and let's talk more about mike pence, who is finding himself at the center of the controversy. what implications could be involved in, how do you draw the