Republican insider Ron Christie discovers how Donald Trump's presidency is changing his party. Trump arrived in the White House offering a populist revolt in America, promising to drain what he calls "the swamp that is Washington D.C". So what does his own Republican Party - traditionally a bastion of the nation’s establishment - really make of him? Where is he taking them and what will he leave behind? Christie, a long-time Republican who has served in the West Wing under George W Bush, takes us on a journey behind the scenes to meet Trump’s inner circle - including figures like Mercedes Schlapp, White House director of strategic communications, and to influential conservative broadcaster Sean Hannity. He talks to the supporters and the sceptics alike who watch in amazement as one of the most controversial presidents of all time takes his country and his party by storm.

Producer: Kirsty Mackenzie