A Democratic activist who successfully helped push for a state ban on cellphones in schools announced Monday a primary run against state Comptroller Tom DiNapoli in 2026.

Raj Goyle, founder of the group Phone Free New York, said he’ll look to take out DiNapoli in what is shaping up to be his most serious election challenge since he was appointed in 2007 and won a full term in 2010.

Goyle, 50, called DiNapoli a “do nothing, go along, get along Democrat” in comments to The Post.

“We need a fighter right now,” he said.

A tech executive and lawyer, Goyle served in the Kansas state House of Representatives and lost a federal congressional race against Republican Mike Pompeo, who would later become secretary of state in the first Trump administration.

Goyle mocked DiNapoli after seein

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