Democrat Vincent Gentile blasted opponent Dan Donovan for cutting the event short.
Candidates running to replace Karim Camara will now have to run on alternative tickets.
The Brooklyn and Staten Island GOP parties officially selected Donovan as their candidate.
Gentile called out Donovan for not addressing the public after the grand jury decision.
Guillermo Philpotts was tasked with choosing a replacement for Karim Camara, but opted to run instead.
The Staten Island Democratic Party announced Brooklyn's Vincent Gentile is its candidate.
A special election will be held May 5 to replace Michael Grimm and Karim Camara.
A federal judge ruled that Gov. Cuomo had until Feb. 20 to set a date for the election to fill the seat.
Geoffrey Davis, Rubain Dorancy and Diana Richardson may run for Karim Camara's Crown Heights seat.
The assemblyman said he won't seek the Democratic ticket for the vacant seat.
Malliotakis announced she won't challenge District Attorney Dan Donovan for the Republican nomination.
A grand jury convened by the DA declined to indict Officer Daniel Pantaleo in Eric Garner's death.
Donovan officially announced Friday he would run for former Rep. Michael Grimm's vacant seat.
A coalition of Republicans encouraged Dan Donovan to run.
State Senate and Assembly seats in four Brooklyn districts have been vacant since January.
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