Driving the news: The new materials detail conversations between Parnas and one of House Intelligence Ranking Member Devin Nunes’ aides and highlight surveillance efforts against Marie Yovanovitch, former U.S. ambassador to Ukraine. Nunes was one of the top investigators in Trump’s impeachment probe.

Parnas did the following, according to documents he provided to the House committee:

Kept hand-written notes outlining the alleged pre-condition of a now-infamous July 25 phone call between President Trump and Zelensky: that Zelensky publicly announce an investigation into Joe Biden, Trump’s political rival in the 2020 election.

Arranged interviews with Nunes aide Derek Harvey and Ukrainian officials, including Yuri Lutsenko, the country’s prosecutor general.