Volker's appointment was unusual, as he continued to draw a salary from the McCain Institute, partly funded through donations from the lobbying firm Barbour Griffith Rogers, where he also served as "senior worldwide advisor".
Rudy Giuliani, a central figure in the impeachment inquiry into President Donald Trump, on Saturday played down his role in a proposed statement negotiated between US diplomats and Ukrainian officials this summer about fighting corruption in the eastern European country. Accusations of wrongdoing by the Bidens have not been substantiated, leading Democrats to say Giuliani has been pushing conspiracy theories.
"There's a lot of talk about Biden's son, that Biden stopped the prosecution and a lot of people want to find out about that so whatever you can do with the Attorney General would be great", Trump told Zelensky in the July 25 call.
It was unclear if Graham's invitation was for Giuliani to appear in public or behind closed doors.
Giuliani has repeatedly refuted the claims made in the whistleblower report, claiming that the State Department asked him to meet with one of Zelensky's top advisers, Andriy Yermak.
Rudy Giuliani, Former Mayor of New York City speaks to the Organization of Iranian American Communities during a march outside the United Nations Headquarters in New York on September 24, 2019. Therefore I will offer to Mr. Giuliani the opportunity to come before the Senate Judiciary Committee to inform the Committee of his concerns, ' he wrote.
Democrats did, however, applaud the move to invite the outspoken Trump attorney. Dianne Feinstein (D-Calif.), said she and her colleagues "have plenty of questions" for him and "welcome the opportunity to question Rudy Giuliani under oath about his role in seeking the Ukrainian government's assistance to investigate one of the president's political rivals". S. ambassador to the European Union and a key witness in the impeachment probe, from giving testimony to investigators for three House committees. Democrats have alleged there was a quid pro quo involved, pointing to hundreds of millions of dollars in foreign aid that was withheld for months without a specified reason.
Gordon Sondland, the US ambassador to the European Union, repeatedly pushed a career civil servant and military attache, William Taylor, who was the U.S.'s top diplomat in Ukraine, to strong-arm Zelenskiy into improving his relationship with Trump. He told The Washington Post on October 8 that he won't testify or provide documents to the House Intelligence Committee, which is chaired by Rep. Adam Schiff (D-Calif.), until Schiff is removed and the full House votes to authorize the impeachment inquiry. Schiff and other Democratic House chairmen said they meant to subpoena Sondland to compel his deposition.