Heidi M. Przybyla

USA TODAY

Hillary Clinton has a closing argument for America: She may have made a mistake by creating a private email server, but Donald Trump poses a threat to global security.

The Republican presidential nominee would imperil America’s most cherished democratic values of equality and freedom “that could tear our country apart,” Clinton told a couple thousand supporters at a rally at Kent State University in Ohio on Monday.

“This goes way beyond politics and partisanship,” Clinton said. “If you’ve studied history, you know the fate of the greatest nations comes down to single moments in time,” she said. “This is one of those make-or-break moments for the United States, so when your kids and grandkids ask what you did in 2016, when everything was on the line, I hope you’ll say I voted for a better, stronger” union.

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In both her public remarks and a final round of television advertising, Clinton is zeroing in on Trump’s prior comments that he is OK with countries like Japan and even Saudi Arabia obtaining nuclear weapons, his embrace of Russian president Vladimir Putin and his tendency to retaliate against his perceived enemies.

“Even the prospect of an actual nuclear war doesn't seem to bother Donald Trump,” Clinton said in Ohio. “Imagine him plunging us into a war because somebody got under his very thin skin,” she added.

Trump “has proven himself to be temperamentally unfit and totally unqualified to be president,” Clinton said.

“It’s not just my name and Donald Trump’s name” on the ballot, the Democratic nominee said. “It’s our future, our security, our values and who we are as a country.”

Her Monday remarks come amid renewed controversy over her private email server after a new tranche of emails from one of Clinton's top aides, Huma Abedin, was found on the laptop of former congressman Anthony Weiner, who is under investigation for texting with minors. Weiner is the estranged husband of Abedin, and the FBI has obtained a warrant to review the emails that Comey told lawmakers "appear to be pertinent to the investigation" into Clinton's server that was closed in July.

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“There is no case here,” Clinton said. As she's done in the past, she said "it was a mistake" to use the server, "and I regret it."

“I am sure a lot of you may be asking what this new email story is about and why in the world the FBI would decide to jump into an election with no evidence of any wrong doing with just days to go,” Clinton said. “That is a good question.”

Clinton is also out with a new round of television advertising featuring the little girl from the iconic “daisy” ad from Lyndon Johnson’s 1964 campaign warning of the dangers of nuclear war.

“The good news is there’s another vision for America,” Clinton said, one that is “hopeful and optimistic and unifying.”

She cited support for veterans, assisting parents, paying workers fairly and marriage equality.

“We’re really talking about what it means to be an American in the 21st century,” Clinton said.