First, the bad news. The on-again, off-again Thursday debate among Democrats’ presidential hopefuls is back on again. The labor strike of 150 cafeteria workers that led all seven qualifying candidates to say they wouldn’t cross a Los Angeles picket line was settled by party Chairman Tom Perez.

For his next trick, perhaps Perez can fix his party’s boring, pointless debates. If recent trends hold, Thursday’s TV audience will shrink, nobody will win or lose and there will be no campaign consequences. Whoopee.

And these are the people who want to run the country.

As for the good news, there isn’t any.

Certainly not for Democrats. It’s not just that they can’t shoot straight — they can’t even find the gun most days.

The public mood on their impeachment jihad is headed south at crunch time and the almost certain failure to attract a single GOP vote in the House will forever expose the effort as a partisan putsch. They will make history in the worst possible way.

As President Trump said in his blistering letter to Speaker Nancy Pelosi, “Your legacy will be that of turning the House of Representatives from a revered legislative body into a Star Chamber of partisan persecution.”

The letter is a breathless rant that reflects Trump’s genuine anger at being impeached and conventional wisdom about the causes and impacts. It’s also a clever way of making his closing argument the day before the full House vote.

Most important, Trump is far from alone in concluding that Dems have been itching for impeachment ever since he defeated Hillary Clinton. He cited a Washington Post story that appeared “nineteen minutes after I took the oath of office” that carried the headline, “The Campaign to Impeach President Trump Has Begun.”

His decision to cite numerous Dem members calling for impeachment throughout his tenure underscores the point. Impeachment always was a goal in search of an excuse.

Trump is also correct that the party-line vote will stand out as an aberration and there will be few serious voices recommending it as a new standard. If it were, elections would have no consequences and the government would cease to function, except for settling political scores.

The letter came as the House droned on in yet another hearing and as Democrats’ Senate leader, Chuck Schumer, demanded that a Senate trial call witnesses such as former national security adviser John Bolton. When Majority Leader Mitch McConnell promptly shot him down by calling the idea a “fishing expedition,” Schumer accused him of bad faith.

That’s rich.

Meanwhile, the hottest topic on the campaign trail, apart from the cafeteria strike, has been the complaint by Sen. Cory Booker and others that the presidential candidates are too white, as evidenced by the fact that Andrew Yang will be the only nonwhite on Thursday’s stage.

The attack is basically an attack on party voters. After all, debate appearances depend on having meaningful poll numbers and sizable numbers of donors, requirements laid out months ago. Having failed to meet those tests, the losers are declaring voters a bunch of racists!

Somehow, this must be Trump’s fault and as soon as Booker figures out how, he’ll let us know. But for now, Spartacus, whose support is a consistently puny 3 percent, will be watching the debate on TV, if he can stay awake.

So it goes in Dem Land, where nothing is going as planned. By now, Trump was supposed to be headed to jail and Mike Pence should have been sitting in the big chair, making for easy pickings in 2020.

If only special counsel Robert Mueller had found Russian collusion. Or if only the Ukraine piffle was impeachable enough to attract GOP votes and wide public support.

If only …

Instead, an average of recent polls show Trump’s approval rating hitting a respectable 46 percent, and the gap between him and leading Dems tightening.

In key swing-state polls, he beats them all in head-to-head matchups.

The trend is not the Dems’ friend in impeachment or next year’s election, but party leaders are either unwilling or unable to change course. Having determined after the 2016 election they would put all their eggs in the basket of resisting and thwarting a Trump presidency, they cut themselves off from voters not already on their side.

One consequence of the all-or-nothing angry approach is the rise of radical voices and policies. From Reps. Alexandria Ocasio-Cortez and Ilhan Omar to open borders, the Green New Deal and Medicare-for-all, Dems have defined themselves as way, way out of the mainstream.

Trump has seized on those mistakes and, combined with the success of his economic policies especially, has been trying to consolidate his supporters and pick off disgruntled Dems. Even modest success with his direct appeals to some of the other party’s core constituents — labor unions, black, Latino and Jewish voters — would change not only this election but party alliances for a generation.

In that sense, Trump could be on to something when he warns Pelosi that voters “will not soon forgive your perversion of justice and abuse of power.”

Four more years would be his ultimate vindication.

Fun to drive left nuts

Reader Donna Montero thinks the left is infected with something even worse than Trump Derangement Syndrome. She writes: “They have what I call Trump Anhedonia. Anhedonia is a clinical term for when you don’t feel any pleasure, and none of these folks have felt pleasure since 2016.

“If Trump gets elected for a second term, the psychosis will top any measurable scale. I yearn for that day already.”

NY’s worst lady

The news that first lady Chirlaine McCray made the decision to block a city statue for Mother Cabrini is shocking but not surprising.

The man who took the fall for the outrageous decision, Cultural Affairs Commissioner Tom Finkelpearl, acknowledged at a City Council hearing that he was not the decider and that McCray was.

Her husband the mayor gave McCray two jobs — and she screwed up both. Her exorbitant, ill-conceived Thrive program is a pit of wasted money and union favors while doing next to nothing about the serious mental health issues many New Yorkers face, especially the homeless.

And now we know that she nixed Cabrini even though the Catholic icon got the most votes in a public contest over which women should get statues.

Gov. Andrew Cuomo, no doubt enjoying the opportunity to score points at Mayor Bill de Blasio’s expense, announced the state would build a Mother Cabrini statue in Battery Park.

One thing is for sure: There will be no statues of Chirlane McCray. Only bad memories.

FBI fix long overdue

The report that the secret FISA court has ordered the FBI to describe how it plans to fix the mistakes and omissions outlined by the inspector general last week is a welcome sign that civil liberties still matter and that the warrant process will be tightened.

It’s also more proof that Jim Comey’s tenure as FBI director truly was a blight on America.