The "Mamdani revolution" comes for House Democrats

• Rep. Mark Pocan (D-Wis.) said he had been predicting "at least 30 percent" of House Democrats would face primaries, but now "that number might turn out to be even higher."
• "You can just tell. It's the year. People's hair is on fire, they just feel like they've got to do something," the former Progressive Caucus co-chair told Axios. "People are pissed, they're sad, they're concerned."

Driving the news: That may even include an effort to unseat House Minority Leader Hakeem Jeffries (D-N.Y.), with New York City Council member Chi Ossé filing paperwork Monday to mount a long-shot primary challenge.

• Ossé wasn't the only New York progressive to make news on Monday. Chuck Park, a former New York Economic Development Corporation staffer, launched a bid against Rep. Grace Meng (D-N.Y.).
• He joins former state Assemblyman and Democratic National Committee vice chair Michael Blake, who is challenging Rep. Ritchie Torres (D-N.Y.).

What's next: Several other New York members are poised to face challengers.

• New York City comptroller Brad Lander and New York City Council member Alexa Avilés are both seen as possible challengers to Rep. Dan Goldman (D-N.Y.), whose district Mamdani won overwhelmingly.
• Rep. George Latimer (D-N.Y.) told Axios he "wouldn't be surprised if I have a primary opponent" backed by the Democratic Socialists of America.
• Rep. Adriano Espaillat (D-N.Y.), the chair of the Congressional Hispanic Caucus, will "likely" be a target as well, a progressive consultant told Axios.

Zoom out: The progressive primary revolt also goes well beyond New York.

• Reps. Shri Thanedar (D-Mich.), Wesley Bell (D-Mo.) and Jimmy Gomez (D-Calif.) are all facing insurgents backed by Justice Democrats, a left-wing group with a long track record of unseating establishment Democrats.
• Several other lawmakers in their 70s and 80s are facing younger challengers going after them on both ideology and age, including Reps. Ed Case (D-Hawaii), Steve Cohen (D-Tenn.) and David Scott (D-Ga.).

Between the lines: "Every young idealist says, 'If Mamdani can do it, so can I.' Never mind that Mamdani is an exceptional talent," said one House Democrat, who dubbed the phenomenon "the Mamdani revolution."

• The lawmaker, who spoke on the condition of anonymity to offer candid thoughts about sensitive internal party dynamics, said they are not worried about their own primary but that some of their colleagues should be — particularly Goldman.
• "Brad Lander is the favorite" if he runs, the lawmaker predicted.
• Rep. Jerry Nadler (D-N.Y.), a longtime New York City politico, told Axios: "Brad Lander will win."

The intrigue: Nadler later called Axios to walk back his comments, saying, "I really don't know who's going to win."

• "I was reacting to some public polling I saw," he added. "I'm not even sure Brad's running.
• Said Goldman spokesperson Simone Kanter: "The Congressman is eager to put his record in Congress against anyone who wants to challenge him over the next seven months. Whether it is Brad or anyone else, they will face the fight of their life if they choose to run against Dan Goldman."
• "Anyone who thinks otherwise doesn't know what they're talking about. Best of luck!"

Yes, but: Mamdani himself isn't fully on board with all these efforts, telling a local TV station of Ossé's run: "Right now is not the time to be engaging in that kind of a primary."

• Rep. Alexandria Ocasio-Cortez (D-N.Y.) told Axios of Ossé's run: "I certainly don't think a primary challenge to the leader is a good idea right now."
• Both declined to weigh in on a possible Lander-Goldman matchup.

What to watch: A Justice Democrats spokesperson told Axios the group is "very interested in building on Zohran's momentum" and that "you can expect more news on that in the coming weeks."

• A second House Democrat who spoke anonymously told Axios that while many of these insurgent candidacies may fall short, "anybody who doesn't take the dynamic seriously does so at their peril."
• "It's going to be a bloodbath in comparison to a default year," they said.

Go deeper: Trump and Mamdani to meet at the White House on Friday

Editor's note: This article has been updated to correct the spelling of Rep. Mark Pocan's first name.