Giuliani says he won't testify before House investigators

President TrumpDonald John TrumpGraham to introduce resolution condemning House impeachment inquiry Support for impeachment inches up in poll Fox News's Bret Baier calls Trump's attacks on media 'a problem' MORE's personal lawyer Rudy GiulianiRudy GiulianiOvernight Defense: Trump's Syria envoy wasn't consulted on withdrawal | McConnell offers resolution urging Trump to rethink Syria | Diplomat says Ukraine aid was tied to political investigations Democrats say they have game changer on impeachment READ: Diplomat describes pressure put on Ukraine to open 'investigations' MORE said Tuesday that he would not testify before the House Intelligence Committee unless committee members voted to remove Rep. Adam SchiffAdam Bennett SchiffThe strange case of 'Dr. Trump' and 'Mr. Tweet' The Hill's 12:30 Report: Trump faces backlash for comparing impeachment to 'lynching' House Republican: Schiff 'should not be leading this whole inquiry' MORE (D-Calif.) from the panel's chairmanship.

In an interview with The Washington Post, the former mayor of New York City said he was taking the White House's position that Schiff's congressional committee was illegitimate. He added the Trump administration would soon release a formal statement concerning the Intelligence Committee.

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“I wouldn’t testify in front of that committee until there is a vote of Congress and he is removed,” Giuliani said, referring to Schiff. “Let them hold me in contempt. We’ll go to court. We’ll challenge the contempt.”

“The position I’m stating is now the position of the administration,” Giuliani continued.

Giuliani joins a growing list of White House and Trump administration officials who have refused to testify before Congress or have been blocked from doing so by the administration, including U.S. Ambassador to the European Union Gordon Sondland, who was blocked from testifying Tuesday.

Giuliani's comments are the latest attack by the administration on House Democrats' impeachment inquiry, which they argue is illegitimate.

Democrats allege Trump during a July phone call improperly pressured Ukrainian President Volodymyr Zelensky to launch an investigation into former Vice President Joe BidenJoe BidenSupport for impeachment inches up in poll Overnight Defense: Trump's Syria envoy wasn't consulted on withdrawal | McConnell offers resolution urging Trump to rethink Syria | Diplomat says Ukraine aid was tied to political investigations Democrats say they have game changer on impeachment MORE, one of his potential 2020 rivals, and has continued to solicit foreign interference in the election.

Giuliani and Trump have denied those claims, arguing that the president is within his rights to investigate allegations of corruption by current and former federal officials such as Biden.

Schiff's office did not immediately return a request for comment from The Hill on Giuliani's comments.