Sen. John McCain, with wife Cindy, front, speaks to supporters after being declared the winner in the Arizona Republican primary Tuesday. The 80-year-old McCain defeated three challengers.

PHOENIX — Sen. John McCain beat back a primary challenge Tuesday from a Republican Tea Party activist to win the right to seek a sixth term in November in a race that has been inundated with questions about GOP presidential candidate Donald Trump.

The 2008 GOP presidential nominee easily defeated former state Sen. Kelli Ward and two other Republicans.

He faces a tough Democratic challenge in the November general election from U.S. Rep. Ann Kirkpatrick. She advanced Tuesday after facing only a write-in opponent in the primary.

McCain vowed to not take the primary for granted, and he campaigned hard until the end. But the contest between Ward and McCain was often overshadowed by Trump and his outspoken comments.

Trump had attacked many issues dear to the Arizona senator, including the family of a fallen soldier, NATO and even McCain’s own military service and time as a prisoner of war in Vietnam.

Yet McCain stuck by his support for Trump, at times seemingly through gritted teeth. He repeatedly avoided calling Trump by name, instead saying he’ll support his party’s nominee.

Trump is set to roll out his plan to handle immigration in Phoenix today, with Republican Gov. Doug Ducey making his first appearance with the GOP nominee. Ducey, like McCain, has said he supports his party’s nominee but avoided Trump in his previous four campaign stops in Arizona.

There’s no word if McCain will appear at the event.