Hillary Clinton continues her bus tour through Pennsylvania and Ohio.

John McCain's granddaughter endorses Hillary Clinton: 'I've been nursing a grudge'

John McCain has backed Donald Trump, but his granddaughter says she is still "nursing a grudge" against the Republican nominee, who famously questioned the Arizona senator’s heroism a year ago.

Caroline McCain endorsed Hillary Clinton in an essay on Medium this week.

"Trump’s statement, in my view, is unforgivable, and speaks to the kind of man he is,” she wrote. "A coward who has never faced danger in his life, an insecure brat who shirked duty for comfort, and a man who is wholly unfit to serve as commander-in-chief.”

Last year, Trump said of John McCain, a former POW in the  Vietnam War: “He’s not a war hero...He's a war hero because he was captured. I like people that weren't captured."

Caroline McCain went on to cite other reasons, including “brick after brick in a wall of racist comments, lies, misogyny and ignorance.” McCain said she still identifies as Republican, but that could change with a Trump victory.

John McCain, the GOP's 2008 presidential nominee who is facing a tough Senate reelection in his home state of Arizona, has urged fellow Republicans to follow the will of Republican primary voters and rally behind Trump. 

Still, McCain has conceded sharp disagreements with Trump, particularly over foreign policy. Trump has questioned the relevance of NATO and said that if elected president, he may not defend allies as the treaty requires.

“I think we shouldn’t forget that our NATO allies have been fighting side by side with us in Afghanistan for a long time,”  John McCain told News Talk 550 KFYI this week in Phoenix, in an interview reported by the Washington Times.

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