Zelenskiy also pointed out that a recently passed law on subsidies for foreign film-makers in Ukraine is meant to attract investment in the country's economy, NBC reported. "There are certain nuances and things which I think it would be incorrect, even, to publish", he noted.
If the House approves articles of impeachment - not introduced at this point - they would be sent to the Senate for trial.
However, in a wide-ranging interview with New Yorker magazine, Hunter Biden claimed that he and his father discussed his business activities in Ukraine "just once".
Mr Trump accused top Democratic politician Adam Schiff of lying to Congress last week about what the US President said to Mr Zelensky in the July phone call. "We further expect that political leaders from both parties condemn any intimidation against our client and others".
"When the facts are convincing to the people, they are to some Republicans", Pelosi said throughout the occasion.
"President Trump and his defenders tell us not to believe our own eyes and ears".
A formal impeachment inquiry is essential for the future and health of our democracy: by holding the president and administration accountable, and investigating any wrongdoing, we will ultimately preserve and protect the kind of America our founders envisioned-a balanced government with a free, fair, and functioning democracy and election system. Ukrainian president Zelensky has backed up Trump, saying there was no pressure, nor quid pro quo, to investigate Biden.
On Thursday, the committees are set to get a deposition from Kurt Volker, who resigned last week as Mr Trump's special representative for Ukraine after the whistleblower complaint named him as one of two U.S. diplomats who followed up with Ukrainian officials a day after Mr Trump's call to Mr Zelenskiy. The phone call with Mr Zelenskiy came after Trump froze almost $400 million in aid meant to help Ukraine deal with an insurgency by Russian-backed separatists in the eastern part of the country. The whistleblower alleged that Trump was soliciting foreign assistance in the 2020 presidential election.
"The president is the whistleblower here", Miller said.
The call occurred around the same time Trump delayed hundreds of millions of dollars in aid to Ukraine, raising speculation from Democrats as to whether the president used the aid as leverage in the talks.