By Nicholas Wu, USA TODAY–

In the second public hearing of House Democrats’ impeachment inquiry into President Donald Trump, former U.S. Ambassador to Ukraine Marie Yovanovitch will testify before the House Intelligence Committee.

Yovanovitch, who had been ousted as ambassador at the end of April, previously told lawmakers and staff behind closed doors that she believed she was removed over “false claims” about her that had been amplified by conservative figures like Donald Trump Jr.

According to her closed-door testimony, when she asked European Union Ambassador Gordon Sondland how to respond to the attacks, she was told to tweet support of Trump.

“You need to, you know, tweet out there that you support the President, and that all these are lies and everything else,” she said Sondland told her.

Sondland said in his closed-door testimony he did not “recall” the conversation.

Deputy Assistant Secretary of State George Kent described in public testimony Wednesday how President Donald Trump’s personal attorney Rudy Giuliani had been part of a “smear” campaign against U.S. officials including Yovanovitch.

Kent said how Giuliani and his associates worked with “corrupt Ukrainians who wanted to peddle “false information in order to exact revenge against those who had exposed their misconduct, including U.S. diplomats, Ukrainian anti-corruption officials, and reform-minded civil society groups in Ukraine.”

David Holmes, a State Department official working under Ambassador William Taylor in the U.S. Embassy in Ukraine, is also scheduled to testify behind closed doors today.

In his public testimony, Taylor said that a member of his staff, later reported to be Holmes, overheard a conversation between Trump and European Union Ambassador Gordon Sondland about investigations a day after Trump’s July 25 call with Ukrainian President Volodymyr Zelensky.

Sondland at the center of inquiry: Sondland said Trump ‘cares more’ about Biden investigation than Ukraine, Taylor says

“The member of my staff could hear President Trump on the phone, asking Ambassador Sondland about ‘the investigations,’ ” Taylor said on Wednesday. “Ambassador Sondland told President Trump that the Ukrainians were ready to move forward.”

Trump denied the existence of such a call to reporters later Wednesday.

“I know nothing about that,” Trump said. “First time I’ve heard it. … I don’t recall. Not at all. Not even a little bit.”

This article originally appeared on USA TODAY: Former Ukraine ambassador testifies in public as a key witness speaks behind closed doors