The materials attract California representative Devin Nunes even more to the efforts of Giuliani and his associates to dig up the dirt from the president's political rivals.
WhatsApp exchanges show that Nunes's aide, Derek Harvey, raised questions about foreign assistance to Ukraine in late March 2019.
Parnas told Harvey in a text message in April that he would be interviewing "the prosecutor who was fired by Biden", who is Viktor Shokin. Parnas also referred to Ukraine's then prosecutor, Yuriy Lutsenko. The two prosecutors also spoke to Giuliani in his effort to unearth former Vice President Joe Biden and his son Hunter.
"Are we going to make our call at 12 and can we make the first prosecutor at 1 in turn?" Parnas texted Harvey on April 17, 2019.
"Okay," Harvey replied.
Two days later, Harvey sent a message to Parnas: "Lev. I think we better serve by sending the official letter and receiving documentation before further interviews".
In a text, Harvey told Parnas in April 2019 that "Solomon needs to supply me with the material".
Apparently, there are several references to meetings at the Trump International Hotel, including a May 7, 2019 meeting with Giuliani and Salomão.
"Can you come now," asked Parnas.
"Yes," replied Harvey.
A Nunes spokesman did not respond to a request for comment.
Last month, Democrats on the House Intelligence Committee included in their impeachment inquiry telephone records of calls exchanged between Nunes and Parnas and other allies of President Donald Trump.
Nunes admitted Wednesday that he spoke to Parnas on the phone after saying earlier that such a conversation would be "very unlikely".