"I do not discuss my conversations with my client", Giuliani replied, talking over the host. "To be perfectly clear, I don't acknowledge any questions from you in this lifetime or the next lifetime", Nunes said while leaving the impeachment hearing.
Giuliani is now dealing with his own investigation federal investigations following claims that he possibly engaged in illegal lobbying and campaign finance violations.
The White House helped arrange a phone call between Rudy Giuliani and Secretary of State Mike Pompeo the day after the President's personal lawyer handed over materials with unproven claims about former Vice President Joe Biden and his son Hunter, according to documents released by the State Department late Friday night.
Yovanovitch testified before Congress that Giuliani had smeared her reputation, raising questions about her loyalty, presumably because she was unwilling to press the Ukrainians to investigate former United States vice president Joe Biden and his son, Hunter, over the latter's Ukraine business dealings.
An ethics group has published almost 100 pages of documents obtained from the State Department that it says clearly detail contacts between President Donald Trump's personal lawyer and the U.S. secretary of state at a key point in the Ukraine affair.
The documents also supported testimony from USA diplomat David Hale, who told the House Intelligence Committee that Pompeo and Giuliani spoke on the phone twice in late March. The career diplomat, who has served both Republican and Democratic presidents, testified last week that she was "kneecapped" by the Trump administration in her efforts to fight corruption in Ukraine.
Giuliani said that in late March, he had "routed" what he called an "outline" of allegations against Biden, as well as former American Ambassador to Ukraine Marie Yovanovitch, to Pompeo's office.
The emails seemed to back up Sondland's claims that many top officials were involved, at the "express direction" of the president, in his request for the Biden probe, as well as information about the hacking of the DNC server in 2016.
Joseph A. Bondy, an attorney for Lev Parnas, the indicted associate of Rudy Giuliani, Trump's personal lawyer, confirmed that his client was willing to testify before Congress that Nunes met with Shokin. As vice president, Joe Biden joined a chorus of global pressure for Ukraine to fire then-state prosecutor Victor Shokin.
Mr Parnas and Mr Fruman were arrested last month on a four-count indictment that includes charges of conspiracy, making false statements to the Federal Election Commission and falsification of records.
A second memo appears to be a summary of an interview with Yuri Lutsenko, also a former prosecutor general of Ukraine, conducted in the presence of Mr Giuliani, Mr Parnas and Mr Fruman.
Lutsenko is quoted saying that he believes Hunter Biden received millions of dollars in compensation from the Ukrainian oil company Burisma.