In this special episode, Anne McElvoy returns to America's capital one year-on from the election to find out how party politics has been transformed by Donald Trump's presidency. She checks in with his biographer Marc Fisher, who says he was thrown into a system "he didn't bother to study". And she attends a keynote delivered by a reflective Bill Clinton. Also on the show, is Russia the worm in the bud for Mr Trump? And the Democrats make their first comeback in local elections.