New impeachment report reveals Giuliani phone records - Who is "-1"?

Schiff did not reveal how the call records were obtained, though the legal "Bates" identifiers used in the report might indicate Giuliani's cell phone records were obtained with a subpoena.

It was not immediately clear who the "-1" calls were with - but the New York Times reported that a similar number was found in cell phone records introduced as evidence in the trial of Roger Stone.

"We can't confirm yet who that "-1" number belongs to, but certainly there were indications in the trial of Roger Stone that when he was communicating with the President it would show up in phone records as a 'dash-one' number," Schiff told CNN's Anderson Cooper in an interview Tuesday evening.

The new report from Democrats also had phone records from Giuliani associate Lev Parnas, who helped Giuliani along with Igor Fruman in Ukraine.

Parnas and Fruman were arrested in early October and charged with illegally funneling foreign money into U.S. elections.

The phone records contained in the new impeachment report also showed Giuliani contacts with Rep. Devin Nunes (R-CA), the top Republican on the House Intelligence Committee, as well as phone calls between Nunes and Parnas.

"Devin Nunes, you should have recused yourself at the outset" of the impeachment hearings," tweeted Joseph Bondy, the lawyer for Parnas, who was arrested as he and another Giuliani associate, Igor Fruman, were leaving the country on a flight to Austria.

While Nunes refused comment to reporters, he told Sean Hannity on Fox News that he didn't really remember calls with Parnas, saying it was 'possible' they had spoken.

Ironically, the revelation of the Nunes-Parnas phone calls came as Nunes filed a $435 million defamation lawsuit against CNN, in which he said, "Parnas was a renowned liar, a fraudster, a hustler, an opportunist with delusions of grandeur."