The sentiment came from the President of the United States, but reflects a common feeling among conservatives and Republicans. He and they are ever more certain that one of the biggest problems in our country is the media’s double standard.

The example at hand was my question about Eric Holder’s seeming endorsement of political violence. The former attorney general said he disagreed with Michelle Obama’s slogan, “When they go low, we go high.”

Instead, Holder declared on a video, “When they go low, we kick ’em. That’s what the new Democratic Party is about.”

President Trump, speaking to me from Air Force One Wednesday night, seemed genuinely astonished at Holder’s remarks, saying, “It’s a disgrace he’s allowed to say that. He’s such a lowlife. Can you imagine if I said that?”

He didn’t need to spell out the details because they are so obvious. If Trump said what Holder said, the sky would open and the media would pour forth hellfire and brimstone at the president they love to hate. He would be accused of using code words to incite violence, of acting like a dictator, of imitating Hitler and of bringing on the end of America as we know it.

But when Democrat Holder follows Democrat Hillary Clinton who followed Democrat Cory Booker who followed Democrat Maxine Waters in urging the left to scrap civility and abandon restraint in their campaign to take back power, the media responds with . . . crickets. Their silence is their endorsement.

Clinton’s remarks that “you cannot be civil” with Republicans also drew his scorn.

“Hillary Clinton doesn’t get it,” Trump said. “She never got it with respect to Bernie [Sanders] and never got it with respect to me and that’s why she lost.”

Direct justification for the unhinged tactics came on — where else? — CNN, where an anchor went so far as to deny that left-wing mobs are mobs at all. Arch-Trump hater Don Lemon insisted they’re just “people who are upset, and they’re angry with the way the country is going.”

This is the same argument the same media used when it enthusiastically embraced and disgracefully parroted every single accusation against Trump’s Supreme Court nominee Brett Kavanaugh. Yet rather than admit their mistakes in smearing Kavanaugh despite his denials and the lack of corroborating evidence, the Dems and their media handmaidens are now descending deeper into the mud by opening the door to ­increasing political violence.

Which is one reason why Trump has no regrets about his steadfast support for Kavanaugh. Although he didn’t directly answer when I asked whether he believed any part of Christine Blasey Ford’s allegations, he made clear that there were so many holes in her story, and no supporting evidence, that sticking with his nominee was the only fair and reasonable course.

“You can’t destroy a man’s great life and reputation on that,” he said.

Trump, of course, survived the media double standard in 2016, and triumphed in part because many of his supporters voted against the propaganda machine as well as Clinton. A similar phenomenon may be in the making again, with polls showing the concerted character-assassination ­attempt on Kavanaugh galvanizing Republicans and independents for next month’s midterms.

Trump had just seen that enthusiasm in his visit to Erie, Pa., where an overflowing, raucous throng had cheered the GOP candidates the president came to support. He marveled at the size of the crowds he’s been drawing, saying they are a good sign for the coming elections.

“We’re doing a good job for the people,” he said. “I’m happy that we’ve been able to produce so much. That’s love in those crowds.”

I asked him to look forward to 2020 and the suspicion that Clinton is hankering for a rematch. It’s a scenario supported by the six-month speaking tour she and Bill Clinton will begin after Election Day, which I believe is timed to let her test the waters without formally announcing her candidacy.

The tour itself, Trump told me, “is not good for Democrats. Many people would like her to stop what she’s saying and go away.”

He recalled with relish her use of the word “deplorables” two years ago, saying “little did anyone realize how it would turn out to be a pivotal moment. It was an amazing mistake by her, but she still doesn’t have a clue.”

I asked whether he thinks she wants to run. “I can’t imagine that she does,” he said, “but I hope so.”

He added: “She didn’t have the strength the last time and I don’t think she has the strength this time, mental or physical.”

Which of the Dem wannabes did he think would be the eventual candidate?

“I’d love any one of them to be chosen,” he answered after I ticked off a list of the usual suspects, including Holder. “There’s not a talented one in the group. They’re going so far left that they will probably take out Sleepy Joe Biden. Then you have Pocahontas [Elizabeth Warren] and Booker. I want one of them to emerge.”

The president has been in a chatty mood the last few days, and one topic getting lots of attention on Wall Street has been his repeated criticism of the Federal ­Reserve’s rate hikes. Although he has said he has no intention of firing Jerome Powell, the chairman he appointed, he emphasized his strong disagreement with the ­interest-rate policy.

“Inflation is not a factor, though at some point it may be,” Trump said. “But what they’re trying to do is ridiculous. They’re taking away this tremendous bounce [in the economy] and trying to neutralize it.”

He compared it to other economies, saying the central banks of China and the European Union “are very accommodating,” which puts the American economy and businesses at a competitive disadvantage.

“The Federal Reserve is making my job harder,” he said. “They don’t know what they’re doing.”

I’m not certain he’s right about the midterms or the Federal Reserve, but I do know this: Trump is on a roll these days, and I wouldn’t rush to bet against him.