House Democrats released new documents Friday evening showing extensive contact between an associate of President Trump’s personal attorney and an aide to the top Republican on the House Intelligence Committee regarding the effort to obtain material from Ukrainian prosecutors that would be damaging to former vice president Joe Biden.

The text messages between Lev Parnas, who functioned as Rudolph W. Giuliani’s emissary to Ukrainian officials, and Derek Harvey, an aide to Rep. Devin Nunes, the ranking Republican on the House Intelligence Committee, indicate Nunes’s office was aware of the operation at the heart of impeachment proceedings against the president — and sought to use the information Parnas was gathering.

The newly released texts show that Parnas was working last spring to set up calls for Harvey with the Ukrainian prosecutors who were feeding Giuliani information about Biden.

“Also do you want to interview the general prosecutor who got [ditched] by Biden ? Also the anti corruption prosecutor ? Let me know,” Parnas wrote on April 19.