When Donald Trump launched his bid for the presidency in June 2015, few observers gave the businessman turned reality TV star a chance. But over the next year-and-a-half, Trump would defy expectations and shatter political norms en route to becoming the nation’s 45th president. This collection of interviews provides new insights into how he won. Conducted for the FRONTLINE investigation Trump’s Road to the White House, it traces key moments from the campaign, as told by insiders who were there at the center of it all.