It’s Debatable: Hillary Clinton and Donald Trump are set to meet at Hofstra University tonight for the first head-to-head presidential debate that will present tough challenges to the candidates as well as the moderator, NBC’s Lester Holt. It’s expected to command one of the biggest American television audiences in history.

Unknown is which face Trump will present, the insulting and factually reckless reality show host, or a mask of presidential dignity. Hillary Clinton, an experienced debater and master of facts, will have to decide whether to engage with Trump on his own level, or stay on high ground. If she goes for the canned zingers, she could get mugged by the expert insulter.

Trump could continue to defy gravity and win votes, even if he doesn’t know what he’s talking about and Hillary Clinton does. Former Barack Obama aide David Axelrod writes, “Mr. Trump’s bludgeoning style and boundless bluster have frustrated opponents, moderators and media analysts all season. But what elite commentators have dismissed as boorishness has, to many alienated voters, signified strength, authenticity and, crucially, a willingness to defy ‘political correctness.’”

 Politico reports that Trump’s people have put together a psychological profile of Clinton to help him exploit weaknesses in her debate style, body language, and personal tics. Clinton is expected to be bookishly prepared, but could be thrown off if Trump throws wild lines at her.

Keith Campbell writes for The Daily Beast that, “The most straightforward way to bring out the worst in a narcissistic individual is through ego threat: Say “you aren’t that good” or “you can’t do that.” Narcissism plus ego threat often elicits anger and aggression, which might make the narcissist look unstable, childish, or like a bully.”

The 90-minute debate is scheduled to consist of 15-minute segments including, “America’s Direction,” “Achieving Prosperity” and “Securing America.” NBC’s Holt will be challenged to keep the candidates on the playing field, and he’ll be faced with some tough calls himself on whether to correct outright lies, or let the opponent do it.

They’re Not with Him: Following up on their editorial endorsing Hillary Clinton for president, the NY Times has published a rare anti-candidate editorial on “Why Donald Trump Should Not Be President.” They go on to list his business bankruptcies, failure to release his tax returns and the extent of his global business interests, his pledge to build a wall on the border with Mexico and shut down Muslim immigration to the US.

The editorial says, “Voters attracted by the force of the Trump personality should pause and take note of the precise qualities he exudes as an audaciously different politician: bluster, savage mockery of those who challenge him, degrading comments about women, mendacity, crude generalizations about nations and religions. Our presidents are role models for generations of our children. Is this the example we want for them?”

Nation: Miami Marlins star pitcher Jose Fernandez, just 24, was killed early yesterday along with two other men when their 32-foot boat smashed into a rocky jetty. Their bodies were found in and under the boat.

Fernandez was born and raised in Cuba. He tried to defect to the United States three times before he got into the country at age 15. The right-hander was drafted in the first round by the Marlins in 2011 and went on to win an All-Star and the National League Rookie of the Year award two years later.

Marlins manager Don Mattingly was barely able to get the words out, speaking about Fernandez. “There was just such joy about him when he played.”

The Obit Page: The great and gentlemanly golfer Arnold Palmer, who was a dominant player from 1958 to 1964, and who immortalized his name inventing a drink mixed from iced-tea and lemonade called an “Arnold Palmer,” has died at age 87.

The handsome and charming Palmer played aggressively. He had 62 wins on the PGA Tour, ranking him fifth, behind Sam Snead, Tiger Woods, Jack Nicklaus, and Ben Hogan.

Like A Rolling Stone: Few things are more American than Rock music and Rolling Stone magazine that was founded to cover the music and musicians. Now struggling to keep the magazine alive in the digital age, founder Jann Wenner has decided to sell 49 percent of the business to the son of a Singapore billionaire. These days, there’s nothing more American than being owned by an Asian investor.

-30-