Gov. Andrew Cuomo, who is backing establishment candidate Melinda Katz for Queens district attorney in Tuesday’s Democratic primary election, warned that lower turnout could result in an upset by insurgent candidate Tiffany Caban — who is supported by lefty Rep. Alexandria Ocasio-Cortez.

“When there is a very low turnout, weird things happen, because there’s a very low turnout,” Cuomo remarked Monday on WAMC’s “The Roundtable.”

“If there’s a higher turnout, then more Democrats speak and … the outcome tends to be more representative of the overall Democratic opinion.

“I’d like to see in this primary, is the energy still that high and are people still coming out? Or has it subsided?” he added.

The results of the DA’s race could go in two directions.

Cuomo noted last June’s stunning upset, in which insurgent Ocasio-Cortez defeated 20-year veteran Rep. Joe Crowley in the 14th Congressional District that takes in parts of Queens and the Bronx. There was a low turnout.

But Cuomo also pointed out that three months later, in the September primary for governor, he trounced challenger Cynthia Nixon by 37 points in the same congressional district.

“How does Crowley lose and I win, by 37 points? It’s the turnout,” he said.

He also argued these typically low-turnout elections have some New York City politicians spooked, causing their rapid movement toward the “ultra-left.”

Corbin Trent, spokesman for Ocasio-Cortez, said the congresswoman has “done numerous emails and events” boosting Caban’s campaign.

Cuomo was asked about Queens state Sen. Michael Gianaris, whose district overlaps Ocasio-Cortez’s in western Queens, endorsing Caban instead of Katz.

“What they’re afraid of — you talked about the New York City Democrats, you mentioned Gianaris — they’re afraid of a primary from the left, and in low-turnout elections, the so-called ‘Joe Crowley Effect,’ where nobody votes but a small base of motivated people does turn out and they lose. So they — some of them — are tripping over themselves on their way to the left to appease this activist, younger demographic,” he said.

“I think many of the New York City Democrats are afraid of the ultra-left, or a product of the ultra-left in the last primary.”

“Believe it or not, some of us do things because we actually believe in them. The governor should try it some time instead of just maligning people to serve his twisted politics,” Gianaris shot back.

The Queens Democrat defied Cuomo several times this year, beginning with trouncing the $3 billion Amazon deal that would’ve brought 25,000 jobs to his district.

Another candidate for DA, Councilman Rory Lancman, the first to announce his candidacy, stirred controversy by dropping out last week and endorsing Katz.

The other candidates in the race include former prosecutor and judge Greg Lasak, Mina Malik, Jose Nieves and Betty Lugo.