Nassau County Executive Bruce Blakeman is set to announce his bid for New York governor on Tuesday — facing off against Rep. Elise Stefanik for the GOP nomination, The Post has learned.

Sources said Blakeman will formally declare his candidacy on Tuesday morning, following weeks of speculation over whether the Long Island pol, a longtime friend of President Trump, would take the fight to Stefanik, a prominent White House ally.

“Bruce will focus on making Empire State more affordable and safer while putting New York first,” a source said.

Nassau County Executive Bruce Blakeman speaks in Massapequa on Nov. 13, 2025. Dennis A. Clark

NY Rep. Elise Stefanik announced last month she was running for governor or New York. Hans Pennink for the NY Post

Speculation has been swirling over whether Trump will weigh in on the race and endorse a Republican nominee in next year’s primary to face off against Democrat incumbent Gov. Kathy Hochul.

Asked if he’d support either one of his allies, Stefanik or Blakeman, on Monday, Trump stayed neutral.

“She’s great. He’s also great,” he said.

“Well, I’ll think about it,” Trump added when asked whether he would endorse either gubernatorial hopeful.

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“He’s great and she’s great. They’re both great people. We have a lot of great people in the Republican Party,” Trump said.

Stefanik has been scrambling to consolidate support amongst party bigwigs since Blakeman first publicly revealed he was seriously considering throwing his hat in the ring after he handily won reelection as Nassau County executive last month.

Nassau County Executive Bruce Blakeman speaks in Mineola on Nov.24, 2025. Dennis A. Clark

Of the 62 local county GOP committee chairs across the state, 58 have endorsed Stefanik. Her backers include rival Rep. Mike Lawler (R-NY) — who had eyed a run himself before he took a pass amid mounting pressure and instead opted to run again for his congressional seat in a swing district in the Hudson Valley.

Early polling shows that Stefanik is a clear early favorite over Blakeman in a GOP primary.

A Siena University survey conducted in late June had Stefanik beating Blakeman and Lawler in a theoretically three-way primary. In that scenario, Stefanik polled with 35% compared with Blakeman’s 7% and Lawler’s 18%.

The Post’s cover on Stefanik’s gubernatorial campaign launch.

Stefanik’s team immediately went on the offensive Monday evening, accusing the Nassau exec of working with Democrats and running to stroke his ego.

“Bruce has no shot and is putting his raging ego first and New Yorkers last as he blows up the best opportunity in a generation to Save New York,” Stefanik campaign spokesperson Bernadette Breslin wrote in a statement.

“After a career of colluding with elected Democrats, Blakeman’s swan song is choosing to prop up Kathy Hochul,” the Stefanik spokesperson continued.

Hochul meanwhile, basked in the brewing GOP fight at an unrelated event Monday morning.

“If there’s a Republican primary, it makes it much more entertaining for me,” Hochul told reporters of Blakeman’s impending entry.

“Let’s let him go at it. Let’s see how they out-MAGA each other in the primary,” she added.