McCain won't endorse in GOP primary
© Greg Nash
McCain has "made up his mind" to not endorse a candidate, WPRI reporter Ted Nesi tweeted Thursday.
McCain, the GOP's 2008 presidential nominee, said he will support whoever wins the primary. For now, he is focused on his own Senate reelection campaign. 
The Arizona Republican had previously endorsed Sen. Lindsey Graham (R-S.C.); Graham dropped out of the presidential race in December. 
"I've got my own race to run."
McCain said he respected Palin's views and declined to criticize her for endorsing the party front-runner. 
Trump faced criticism over the summer after mocking McCain's time as a prisoner of war, saying: "I like people who weren’t captured."