forth with complaints, with criticisms, and they can do so without fear of zblalgs it's our reporting that he explained how he worked to corroborate the whistle-blower claims. is it fair to say that's what happened? >> i think that's fair to say. >> since the whistle-blower made his or her report, we've seen the notes or the rough transcript of the phone call with the president. we've now seen these text messages. so i think one question americans have is, did he provide anything more than that? are there even more witnesses or is there more evidence that the american people don't know about? >> that's why it's critically important that the white house is cooperative with congress, if they have nothing to hide, then they should be working in cooperation with our committee chairs and work in cooperation with the subpoenas that have