We speak with New Yorker writer and historian Jill Lepore about Trump, the Tea Party and the constitution. She tells us how they go together, and how they don't. This conversation was recorded on the day of Trump's inauguration and we also have some voices and sounds from the event in Washington. Plus we try to make sense of what the Supreme Court verdict about Article 50 means for the sovereignty of the UK parliament, and what it means for Ireland and Scotland.