We catch up with Gary Gerstle and Helen Thompson about the state of the Trump presidency, from and cover-ups to Syria and Ukraine. We ask what it would take for Republican senators to desert him and what the collateral damage is likely to be for the Democratic presidential candidates. Plus is Hillary really - really?! - back in the game?
We talk to the author of Guns, Germs and Steel about his new book on nations in crisis. Jared Diamond argues that personal crises are a good way of thinking about national ones. He tells us about one of his own personal crises and we see whether the lessons really apply to politics. Plus we discuss what's gone wrong with political leadership in the US and we explore what it would take to tackle the global environmental crisis.