Donald Trump's first year as president has been marked by unprecedented turmoil: open warfare with Republican leaders, Twitter attacks on GOP senators, and inflammatory statements that rally Trump's base, outrage Republican legislators and further divide the country. In Trump's Takeover, FRONTLINE investigates how an outsider and novice politician came to Washington on a promise to 'drain the swamp' and inflamed a high-stakes struggle for control of the Republican Party. Through interviews with senior White House officials, Congressional leaders, close Trump confidantes and longtime Republican Party officials, Trump's Takeover examines how ambitions for unified Republican control in Washington collided with the realities of a deeply divided party.