The new material indicates that Parnas played a central role in arranging an interview with a Ukrainian prosecutor who claimed there was a plot in his country to help Hillary Clinton — and then urging a senior contact at America First Action to get Trump’s eldest son, Donald Trump Jr., to tweet it. (snip)

The messages show Parnas helping arrange a video interview for Lutsenko with John Solomon, a conservative columnist at the Hill newspaper. On March 12, Parnas sent a letter from Solomon to Lutsenko requesting the interview and included a list of questions to be addressed. “I sent you the questions and the invitation from the journalist, call me when you wake up,” Parnas writes after sending the letter to Lutsenko.

After the interview posted online, Parnas texted it to Ahearn and wrote, “Have jr retweet it.”

“Sent,” Ahearn responded.

Parnas then urged Ahearn to “Watch Hannity.”

Later that night, Trump himself tweeted coverage of the story by Fox News’s Sean Hannity.

Several days later, Parnas sent Ahearn an article about calls to push out Yovanovitch, to which Ahearn responded, “That’s a good article.”

That same day, Trump Jr. tweeted out the article and wrote that the United States needed “less of these jokes as ambassadors,” referring to Yovanovitch, a career diplomat.

In the newly released messages, Parnas wrote to Giuliani: “This is who the retainer should be me out to: ministry of justice of Ukraine Att: minster Pavlo Petrenko.”

“How much?” Giuliani responded. Giuliani said he would follow up with a call, and the messages suggest he sent an agreement to Parnas, who agreed to “print it out and deliver it.”

Later, Parnas asked Giuliani to send wire instructions and requested a copy signed by Giuliani and “Victoria and joe” so the contract can be executed — an apparent reference to Toensing and her husband, Joe diGenova.

“Can do that tomorrow,” Giuliani replied.

The next day, Parnas wrote, “I received signed retainer.”

In response to Parnas' interview, White House press secretary Stephanie Grisham said Thursday morning, "These allegations are being made by a man who is currently out on bail for federal crimes and is desperate to reduce his exposure to prison."

"The facts haven’t changed — the president did nothing wrong and this impeachment, which was manufactured and carried out by the Democrats has been a sham from the start," Grisham said.

In a statement to "The Rachel Maddow Show" while the program was airing, Giuliani denied that he told Ukrainian officials that Parnas spoke on behalf of Trump.

"Never," Giuliani responded when asked whether Parnas was speaking for Trump.