Washington - President Donald Trump's personal lawyer Rudy Giuliani will not co-operate with an impeachment inquiry that is homing in on his efforts to pressure a foreign government to investigate one of Trump's political rivals, his lawyer said on Tuesday.
"This appears to be an unconstitutional, baseless, and illegitimate 'impeachment inquiry'," Guiliani's lawyer, Jon Sale, told the House Intelligence Committee in a letter.
Information being sought relating to Giuliani's work in Ukraine is protected by attorney-client privilege and other privileges, the letter said.
"In addition, the subpoena is overbroad, unduly burdensome, and seeks documents beyond the scope of legitimate inquiry," Sale wrote.
US lawmakers were hearing closed-door testimony from a senior US diplomat, George Kent.
Kent appeared despite being ordered by the White House and the State Department not to co-operate with the probe. He was served with a subpoena by lawmakers on Tuesday morning.
Democrats in the US House of Representatives are examining whether there are grounds to impeach Trump for asking Ukrainian President Volodymyr Zelenskiy in a July 25 phone call to look into unsubstantiated allegations about political rival Joe Biden.
The former vice president is a leading contender in the Democratic nominating contest to run against Republican Trump in the November 2020 US presidential election.
Kent, who has spent much of his career fighting corruption in Ukraine and elsewhere, is the second career diplomat to testify as part of the probe after being subpoenaed. The White House and State Department ordered them not to appear.
It was unclear what Kent, a deputy assistant secretary of state responsible for US policy toward six former Soviet republics including Ukraine, was telling lawmakers.
According to the New York Times, Kent raised concerns with colleagues as far back as March about Giuliani pressuring Ukraine to pursue investigations into Trump's political rivals.
Lawmakers have already heard unsettling accounts from other US officials.
Marie Yovanovitch, the former US ambassador to Ukraine, on Friday accused the Trump administration of recalling her in May based on false claims.
Fiona Hill, Trump's former Russia adviser, told lawmakers on Monday that she and her then-boss, former national security adviser John Bolton, were alarmed this summer by efforts to force Ukraine to investigate Biden and other rivals and advised her to notify a National Security Council lawyer, according to a source familiar with her testimony.
Hill told lawmakers that Bolton characterized Giuliani as "a hand grenade who is going to blow everybody up," according to two sources familiar with her testimony. A Bolton spokeswoman said he would have no comment on the testimony.
Giuliani, a former New York City mayor, faced a Tuesday deadline to produce documents related to the Ukraine matter.
Democratic Representative Jackie Speier, a member of the Intelligence and Oversight committees, told MSNBC that House Democrats would likely move to hold Giuliani in contempt if he does not co-operate.
Gordon Sondland, the US ambassador to the European Union who was involved in the Ukraine discussions, is due to testify later in the week in response to a congressional subpoena.
HUNTER BIDEN DENIES WRONGDOING
The investigation is focused on the July call in which Trump pressed Zelenskiy to have Ukraine officials investigate Biden and his businessman son, Hunter Biden, who had been on the board of a Ukrainian energy company.
Hunter Biden, 49, denied doing anything improper in past work for the company but acknowledged that he had benefited professionally from his father's political career in an interview with ABC News that aired on Tuesday. Joe Biden has rejected Trump's allegations of corruption.
Democrats have accused Trump of pressuring a vulnerable US ally to dig up dirt on Biden after withholding $391 million in US security aid intended to help combat Russian-backed separatists in the eastern part of Ukraine. Zelenskiy agreed to investigate. Trump eventually allowed the aid.
Trump has denied wrongdoing and defended his request to Zelenskiy during the phone call, the contents of which was revealed by a whistleblower.
The House Intelligence, Oversight and Foreign Affairs panels conducting the Ukraine phase of the inquiry are expected to turn over their material to the House Judiciary Committee once their work is complete.
House Speaker Nancy Pelosi and her fellow Democrats might then submit formal articles of impeachment against Trump to the full House. The Senate, controlled by Trump's Republican party, would then hold a trial to determine whether the president should be removed from office.
According to State Department emails seen by Reuters, diplomat Kent told colleagues that Yovanovitch had become the target of a "classic disinformation operation."
Yovanovitch on Friday denied Giuliani's allegations that she provided a "do not prosecute list" to Ukrainian officials to protect Biden and others.
"One key sign of it being fake is that most of the names are misspelled in English — we would never spell most that way," Kent said in the email to colleagues.
Kent, who majored in Russian language and literature at Harvard, has held several jobs requiring him to grapple with corruption in Ukraine, which ranks 120th of 180 nations in a Transparency International corruption perceptions index.