"The Post": New Concerns Russia is Spying on Trump-Giuliani Calls.
BLITZER: President Trump's phone calls with his lawyer, Rudy Giuliani, are -- about Ukraine are sparking very serious new concerns. CNN's Brian Todd is joining us right now. Brian, the fear is that what adversaries might be listening in on the President's phone conversations?</s>BRIAN TODD, CNN CORRESPONDENT: That's right, Wolf. There are real concerns tonight that the cell phones used for the calls between Giuliani and Trump, and Giuliani and others, might not be encrypted or otherwise secure. And given that Giuliani has made and received several of his calls while he's been in Ukraine where Russia has a massive spy network, well, the concerns are even greater.</s>TODD (voice-over): Tonight, there are new concerns that Rudy Giuliani's communications with President Trump about possible dirt in Ukraine on the Bidens could be monitored by the Russians.</s>ERIC O'NEILL, NATIONAL SECURITY STRATEGIST, VMWARE CARBON BLACK: One concern would be that, say, the Russians maybe have compromised Giuliani's phone.</s>TODD (voice-over): "The Washington Post," citing current and former U.S. officials, reports that President Trump has routinely communicated with Giuliani and others over cell phones and other lines that are not secure. "The Post," citing one former senior White House aide as saying it happened all the time. Giuliani, experts say, is likely a huge target for Russian intelligence every time he goes to Ukraine.</s>AKI PERITZ, FORMER COUNTERTERRORISM ANALYST, CENTRAL INTELLIGENCE AGENCY: For him to be talking on an unsecured cell phone is a bonanza for an intelligence service like Russia.</s>TODD (voice-over): Phone records released by the House Intelligence Committee this week show that Giuliani had several calls with people at the White House and others who allegedly were involved in the campaign to pressure Ukraine. The fact that House investigators were able to get those records from a phone company raises concerns that Giuliani wasn't using a phone that was encrypted or otherwise protected. Former CIA and FBI analysts tell CNN, if Giuliani's phone wasn't secure, the Russians could easily have listened in on conversations Giuliani had while he was in Ukraine since the Kremlin has spies and electronic surveillance all over Ukraine.</s>O'NEILL: I would not be surprised if Russia has compromised Ukraine's telephone system. And if they're able to do that, that's the easiest way to listen into a call that originates or is received within Ukraine.</s>RUDY GIULIANI, PERSONAL ATTORNEY TO PRESIDENT DONALD TRUMP: Have a safe trip, bye-bye.</s>TODD (voice-over): Experts say if the Russians listened in on Giuliani's calls with Trump and others and picked up secrets on the campaign to pressure Ukraine to investigate Trump's political rivals, Moscow could exploit the information for its own gain. Vladimir Putin and his spies could put out more propaganda on the false claim that Ukraine meddled in the 2016 election, or they could pull a classic Kremlin tactic and feed false information to Giuliani.</s>PERITZ: Rudy Giuliani is a person who takes in all kinds of information. The Russians could feed him this information that he would, in turn, give to the President of the United States.</s>TODD (voice-over): The latest concerns, all the more surprising considering that Trump slammed Hillary Clinton during the 2016 campaign for her e-mail habits.</s>TRUMP: She routinely sent classified e-mails on an insecure private server that could be easily hacked by hostile foreign agents.</s>TODD (voice-over): Since then, whether at the White House, Mar-a- Lago, or elsewhere, President Trump has been criticized for using cell phones for sensitive calls, mobile devices which are harder to secure than landlines.</s>TODD: Neither the White House nor Rudy Giuliani has responded to CNN's request for comment on "The Washington Post" report and other reporting by CNN and others on the concerns about their use of unsecured phones. But last year, when CNN did similar reporting, a senior White House official did brush back, claiming the President's cell phone was secure, and that he had accepted the security protocols recommended by the White House I.T. office -- Wolf.</s>BLITZER: Brian Todd reporting for us. Thank you very much. The breaking news next, the White House blasts the House impeachment proceedings and makes it clear it will not be participating until the Senate puts President Trump on trial.