Jon Stewart is either showing his rust ... or his true self.

The former host of Comedy Central’s “The Daily Show” voluntarily left the gig last year. Liberals and mainstream media outlets mourned his exit, particularly as the 2016 presidential campaign was just taking shape.

It’s been some time since he’s been able to publicly weigh in on the presidential race.

So you can’t blame Stewart for commenting on current events during an appearance Monday at the University of Chicago. The event, a live taping of the podcast “The Axe Files with David Axelrod,” found Stewart chatting with the former Obama adviser.

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Stewart took on a number of questions, from his views on political correctness to Donald Trump’s campaign theme – “Make America Great Again.”

That’s where Stewart revealed a tad too much of his true feelings.

“When was America great? What is this time that he speaks of? ‘81 to ‘82? Like, what are we talking about? And who took your country away from you?” Stewart asked. “Who’s country – Who’s country is it? Take up the argument with the Founders. Take it up with the Age of Reason. That’s — All men are created equal. That’s f***ed the whole thing up.”

One caricature of the modern American liberal is that they hate their country. Both parties suffer from similarly unfair stereotypes, like conservatives not caring about clean air and water.jon-stewart-daily-show

Put bluntly, plenty of center-left folks love the USA dearly. Yet Stewart seems a mite conflicted on the subject. That’s being kind.

He’s also showing some comic ring rust. He conveniently forgets the left’s mantra during President George W. Bush’s eight years in office — “regime change begins at home.”

Liberals like Stewart clung to the “take our country back” line during that tumultuous era. Now, it’s deemed “racist” to even suggest the turn of phrase.

A truth teller would have a field day with that hypocrisy. Just don’t expect Stewart to do the honors. He’s no longer in the game. And, when given the chance to pinch hit, he can’t clear the bases with one withering gag.