Take the John Catsimatidis grocery-store challenge, Zohran!

Supermarket mogul John Catsimatidis has made an offer that democratic socialist Zohran Mamdani shouldn’t refuse: Test your government-run grocery socialism now.Lefty mayoral candidate Mamdani wants to open city-run supermarkets; Cats has agreed to pilot the program, with one big caveat: “If they want to try an experiment, I will be helpful — as long as the city makes up the shortfall for shoplifting,” Catsimatidis told The Post.Why wait? Do it now — Zohran can cover any losses from his own deep family pockets.After all, if it works, it’ll be a big political winner, right?We long to see him try to run a going concern under city procurement processes, public-employee work rules and so on.

It’ll no doubt be as customer-friendly as the DMV and the Post Office and as safe and wholesome as NYCHA projects.Really, Zohran, you should try.

The many New Yorkers who fled communist regimes in Europe, Latin America and Asia need convincing that socialism is the answer: Prove it, and you’ll waltz to victory!  Just to be safe with the family money, though, maybe cover the costs with your campaign cash: That warchest is at $8 million — and nearly all of it came from the taxpayers anywayAfter all, it’s traditional for socialists to only put their ideas into practice using other people’s money....