WASHINGTON – House Judiciary Chairman Jerry Nadler has attracted yet another primary challenger – this one politically aligned with 2020 presidential hopeful Andrew Yang.

Jonathan Herzog, a 25-year-old former Yang staffer, announced his intentions to primary Nadler, entering an increasingly crowded Democratic race for the 10th Congressional District seat.

“This was fully and solely my decision, but essentially the journey was I moved to Iowa to build [Yang’s] campaign operation and the campaign took off and the Yang Gang became a national movement. And the question just came up over and over again, well how do we get this agenda … and the Freedom Dividend through Congress?” Herzog explained to The Post in an interview Tuesday.

Yang’s big idea is to give Americans over 18 $1,000 a month, a concept called Universal Basic Income, that he’s re-branded for his campaign, calling it a “Freedom Dividend.” His aim is to offset job losses from higher levels of automation.

“And so I looked back at my home district, where I grew up in New York and saw, well, the best way to get it through Congress would make it a first, urgent legislative priority, was to run myself,” Herzog continued. “So I moved back home and announced a run.”

Herzog would be the first openly gay person to hold the seat, in the district that contains the historic Stonewall Inn, his campaign pointed out.

Herzog doesn’t have an official endorsement from Yang, with the 2020 hopeful’s campaign giving a “no comment” to The Post when asked about the former aide’s announcement.

Herzog does hope to benefit from the “Yang Gang,” Yang’s web-savvy group of supporters, which have enabled the novice politician to make the September debate stage, over a number of sitting senators and governors.

“I’m building a grassroots campaign on my own,” Herzog said. “But I’m also thrilled to have the support of the Yang Gang.”

And he hopes that Yang will eventually appear in New York with him. “To the extent that our schedules and everything line up in the city,” Herzog offered.

Herzog joins a race in which Nadler has already attracted three primary challengers. They are Amanda Pearl Frankel, Holly Lynch and Lindsey Boylan, according to Federal Election Commission records.

Boylan’s campaign has, so far, been the more formidable.

The former aide to Gov. Andrew Cuomo raised $264,657 during the first quarter that she was in the race.

“I welcome all candidates,” she told The Post, responding to Herzog’s entry. “A healthy democracy needs more, not fewer candidates.”

As for Nadler, Herzog called him a “patriot and a great public servant.”

“And my goal is not to campaign negatively against him, it’s to, with great urgency, address the central challenges of this fundamental economic shift of our time, beginning with the Freedom Dividend,” the new candidate added.

Though when asked if Nadler opposed the Freedom Dividend, Herzog didn’t know.

“I’m not sure what his stance is,” Herzog said.

Nadler, 72, who represents parts of Manhattan and Brooklyn, was first elected to Congress in 1992 after serving 16 years in the New York State Assembly.