Former Massachusetts Governor Bill Weld has experience taking down a Republican president. He began his career in politics as one of the first lawyers hired to investigate Watergate for the House.

Working alongside another low-level staffer named Hillary Clinton, his job was to define what constituted an impeachable offense for a president. Now, he’s one of the rare Republicans who thinks Donald Trump’s actions have met that definition. He’s called for the president to be impeached, and even to resign his office.

He joined Isaac Dovere on this week’s Radio Atlantic to discuss his time investigating Watergate, the state of the Republican Party, and why he thinks his candidacy isn’t such a longshot.

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