McCain is an exploration of Senator John McCain (R., Ariz.)’s complicated relationship with President Trump and the Republican Party, as well as his life and politics. Drawing on both new interviews and FRONTLINE’s deep archive of reporting, McCain traces the conservative standard-bearer’s motivations and his political history – from his experience as a prisoner of war in Vietnam, to speaking out against torture during the Bush administration, to his dramatic vote against the GOP’s health care bill last year. The film also examines how, with his 2008 nomination of Sarah Palin as running mate, McCain himself contributed to a growing challenge to the party establishment.