Rep. Devin Nunes accused Democrats of doing “nefarious things” with Lev Parnas, an indicted former associate of Trump lawyer Rudy Giuliani who provided documents to House investigators as part of their investigation into President Trump’s alleged dealings with Ukraine.

With the impeachment case entering the trial phase, House Democrats released a document this week that showed Nunes’s aide, Derek Harvey, talking with Parnas about the effort to obtain dirt on former Vice President Joe Biden from Ukrainian prosecutors. Nunes also had a phone call with Parnas.