An exploration of Sen. John McCain’s complicated relationship with President Trump and his own Republican Party.

“McCain” traces the GOP’s evolution across McCain’s political lifetime, and how President Trump came to see him as a foe. From McCain’s 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, to how his choice of Sarah Palin as running mate contributed to a growing challenge to the party establishment, “McCain” traces the conservative standard-bearer’s motivations and his political history.

“McCain” premieres Tues., April 17 at 10:00 pm on PBS & online: