Democratic vice presidential nominee Tim Kaine Timothy (Tim) Michael KaineTrump meets with potential Supreme Court pick Amy Coney Barrett at White House Names to watch as Trump picks Ginsburg replacement on Supreme Court Barrett seen as a front-runner for Trump Supreme Court pick MORE said Monday that he trusts running mate Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE with the life of his son, a Marine.

“I trust Hillary with my son's life, I know her. If she has to grapple with the hard national security questions, she's a good listener, she's going to get good people around her, she's going to cross-examine, she's going to weigh diplomacy and the use of military force," Kaine said at a Florida rally on Monday.

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“Donald Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE is out there praising [Russian President] Vladimir Putin as a great example of leadership in the world, saying more nations should get nuclear weapons. Donald Trump as commander in chief scares me to death,” he said.

Kaine also brought up Trump's controversial criticism of Sen. John McCain John Sidney McCainBiden's six best bets in 2016 Trump states Replacing Justice Ginsburg could depend on Arizona's next senator The Hill's Morning Report - Sponsored by Facebook - Washington on edge amid SCOTUS vacancy MORE (R-Ariz.) from last year, when Trump chided the GOP elder for getting captured in the Vietnam War, to frame his candidacy as dishonorable to soldiers who risk their lives “our of a patriotic desire to serve our country.”

“They are going to have a guy running for commander in chief calling the military a disaster, who made fun of John McCain: ‘He's no hero because he was captured. I like people who weren't captured.’ ” Kaine said.

“Who would even think of that, much less let that come out of their mouth and want to be commander in chief at the same time?”