Booker calls NYC 'Newark's suburb' in email fundraising off de Blasio
© Greg Nash

Sen. Cory BookerCory Anthony BookerThe Hill's Campaign Report: Battle for Senate begins to take shape Steve King to Gillibrand: Odds of me resigning same as yours of winning presidential nomination We need a climate plan for agriculture MORE (D-N.J.) fundraised off New York City Mayor Bill de BlasioBill de BlasioSenate Democrats push Trump to permanently shutter migrant detention facility The Hill's Campaign Report: Battle for Senate begins to take shape CNN to host de Blasio, Bullock town halls MORE’s (D) entry into the crowded Democratic presidential field on Thursday, quipping that New York was “Newark’s suburb.”

“You may have heard of Newark’s suburb, New York City,” Booker said in an email to supporters, referencing the New Jersey city where he used to serve as mayor. Booker noted that de Blasio's entry into the race means that two dozen Democrats are now running.

Booker used the fundraising email to invoke the size of the primary field and the limited number of slots on the debate stage, a frequent theme of his fundraising pitches. The New Jersey senator has signaled that he has met the threshold to appear in the debates.

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To qualify for primary debates, candidates must reach 1 percent in at least three national or primary state polls or have at 65,000 unique donors with at least 200 donors in no fewer than 20 states. If more than 20 candidates qualify, reaching both thresholds will serve as a tiebreaker.

"With such a crowded field, the [Democratic National Committee] will have no choice but to get more aggressive in defining who qualifies for the debate stage," Booker wrote in the fundraising pitch. "That means it’s no longer just about guaranteeing a spot for that first debate, but for future debates as well."

De Blasio’s entry has largely been met with mockery from the right since he announced Thursday, with President TrumpDonald John TrumpO'Rourke: Trump driving global, U.S. economy into recession Manchin: Trump has 'golden opportunity' on gun reforms Objections to Trump's new immigration rule wildly exaggerated MORE calling the liberal two-term mayor a “JOKE” and the right-leaning New York Post mocking him on its Thursday cover.