Giuliani associate says John Bolton is a key impeachment witness, bolstering Democrats' calls for him to testify in Senate trial

Josh Roberts/Reuters

• Rudy Giuliani's associate Lev Parnas told MSNBC's Rachel Maddow on Wednesday that former national security adviser John Bolton knows "100%" about the Trump administration's efforts to pressure Ukraine. 
• "He has a lot to say," Parnas told Maddow. 
• Democrats in both the House and Senate want Bolton to testify in the impeachment proceedings. 
• Bolton released a statement on January 6 saying he was "prepared to testify" if subpoenaed by the Senate during the impeachment trial.
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Rudy Giuliani's associate Lev Parnas said on Wednesday that former national security adviser John Bolton is a "key witness" to President Donald Trump's dealings with Ukraine.

In an exclusive interview with MSNBC's Rachel Maddow on Wednesday, Parnas discussed his role in Trump's apparent pressure campaign against Ukraine, which is at the center of Trump's impeachment. 

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