Investigations collided this week as two key witnesses in President Donald Trump’s impeachment investigation werearrested late Wednesday and charged with campaign finance violations in a separate case. The two men are associates of Trump’s personal attorney, Rudy Giuliani, and have been charged by federal prosecutors with conspiracy and lying to the FEC about donations they made to a pro-Trump Super PAC last year. Both men had been scheduled to appear before Congress this week about their connection to Giuliani’s alleged efforts to pressure Ukraine for dirt on the Biden family.

To discuss all this and more, Jim Braude was joined by Bruce Singal, who worked alongside Special Counsel Robert Mueller in the U.S. attorney’s office in Boston, and Gautam Mukunda, a Harvard Kennedy School fellow and author of "Indespensible: When Leaders Really Matter."