As the city marks Zohran Mamdani’s 100th day as mayor, a lot of New Yorkers are experiencing buyer’s remorse — while the rest are saying, “We told you so.”

For the most part, his mayoralty so far has been marked by a lot of bluster — crying about Islamophobia, racism and his quest for higher taxes — but not much else.

At the same time, he’s admitted reality in dropping some of his signature lunatic ideas: free buses, scrapping a key NYPD unit, etc.

The lefty media is still starry eyed for him, and his pro-terror wife, even as a majority of New Yorkers say the city is on the wrong track, an Emerson College poll found.

But how is Mamdani actually doing? Let’s grade his work.

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Crime: Mamdani has never made crime a priority, and he has a long record of slamming those who fight it. 

He’s called out the cops for nonexistent racism and proudly supported people who try to kill them. 

This week he boasted that he was taking “bold, unapologetic actions to protect New Yorkers.” Adding more cops? Stepping up patrols?

No: “Doubling down on Sanctuary Cities and committing firmly to closing Rikers,” his self-mocking press release reads.

Meanwhile, his Department of Community Safety got downgraded to a mere office that will do nothing to improve safety, but might well siphon needed resources from actual cops, even as Mamdani refuses to pay for more hires to offset an ongoing officer exodus. 

On the plus side, the crime news so far has been good, with record-low numbers of murders and shooting incidents. 

But the credit for that goes exclusively to the hard work of NYPD Commissioner Jessica Tisch and the men and women of the department. 

Grade: B-. Tisch did all the work, while Zo recorded TikToks.

The economy: When jobs are fleeing and big guns like JP Morgan Chase’s Jaime Dimon are warning of a corporate mass exodus, a responsible mayor would take a hard look at how his economic plans — taxing the rich, raising minimum wages, freezing rents — are playing out in the real world. 

Not Mamdani! Instead, he put out an extensive plan to impose wokeness, under which opportunity is to be doled out by skin color.

It’s already drawn the attention of the Justice Department. 

The mayor also issued a bizarre “True Cost of Living” report, using a made-up stat to back the preposterous claim that 62% of New Yorkers don’t earn enough to “fully participate in the economy and save for the future.” 

Everyone hoping for a modicum of economic sense from City Hall should stop holding their breath. 

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Grade: F-. The mayor clearly never took the prerequisite course, Econ 101.

Budget: Mamdani’s facing a $7.1 billion hole (don’t buy his fake $5.4 billion number), yet the best he can do is pretend to look under sofa cushions and threaten to slam New Yorkers with a property tax if Albany won’t raise other taxes. 

Meanwhile, he’s already dropping or shrinking his campaign promises — is he demanding more cash simply to keep feeding the beast of the nonprofit-profiteer industrial complex and city-employee unions?

With a $7.1 billion hole, we’re still wondering how he’ll square that circle. 

Grade: F-. He’s unable to grasp the core problem: Taxes and revenue are sky-high, but spending is far higher.

Education: Mamdani went to the private Bank Street School, which costs $66,000 per year. So no one should be surprised about his contempt for the less-affluent who have no choice but to rely on New York’s once-great public-school system.

No shock, then, that he appointed Kamar Samuels, a noted hater of gifted and talented programs, as schools chancellor. 

Samuels is a similar hypocrite, having sent his own kid to Browning, another private school set up to educate John D. Rockefeller

In his and the mayor’s favor, Samuels did admit that New York’s class size law is simply not tenable.  

Grade: C-. Dear Prof. Mamdani, Mrs. Nair — We need to have a conference about your son. 

Bottom line: Mamdani’s ideas have been awful, and though he hasn’t yet made the worst of them, neither has he deviated much from his dangerous, college-frat socialist ideology.

If he doesn’t do some quick studying up, the whole city’s going to flunk out.