we appreciate it. to our viewers, thanks so much for watching. i'm wolf blitzer in "the situation room." you can follow me on twitter and instagram. erin burnett outfront starts right now. next, breaking news. taking witness protection to the extreme. democrats considering a secret location, special technology if the whistle-blower will testify. what has them so afraid? the president's closest allies turning on trump after a decision that could affect american security. how is the president responding. >> reporter: new concern about the damage attacks are having on joe biden. how is joe biden responding to him. let's go outfront. good evening. tonight the breaking news. going to the extreme. sources telling cnn democrats preparing to take drastic and unprecedented steps in order to protect the identity of the