• New York State Nurses Association
• Communications Workers of America: District 1 (CT, ME, MA, NH, NJ, NY, RI, VT), Local 1103 (Westchester), and Local 1107 (Rockland)
• 32BJ SEIU
• Fifth Division of the New York State Professional Firefighters (Nassau, Putnam, Suffolk, and Westchester)
• IATSE Local One
• Hudson Valley Stonewall Democrats
• New York State Senator James Skoufis
• New York State Assemblymember Sandy Galef
• New York State Assemblymember Amy Paulin
• New York State Assemblymember Victor Pichardo
• New York State Assemblymember Gary Pretlow
• New York State Assemblymember Daniel O'Donnell
• New York State Assemblymember Nader Sayegh
• Westchester County Clerk Tim Idoni
• Westchester County Board of Legislators Chairman Ben Boykin
• Former NY-17 Democratic Congressional Candidate and Westchester County Legislator Catherine Borgia
• Westchester County Legislator Colin Smith
• Westchester County Legislator Kitley Covill
• Former Westchester County Legislator Richard Wishnie
• Bedford Democratic Committee
• Harrison Democratic Committee
• Mount Kisco Democratic Committee
• Mount Pleasant Democratic Committee
• New Castle Democratic Committee
• North Castle Democratic Committee
• White Plains Democratic Committee
• Yorktown Democratic Committee
• Chestnut Ridge Deputy Mayor Grant Valentine
• Chestnut Ridge Village Trustee Chaim Rose
• Cortlandt Town Board Member Rich Becker
• Cortlandt Town Board Member James Creighton
• Former Croton Villiage Trustee Kevin W. Davis
• Elmsford Village Trustee Ed Rush
• Harrison Town Board Member Frank Gordon
• Mount Kisco Mayor Gina Picinich
• Mount Kisco Deputy Mayor Jean Farber
• Mount Kisco Trustee Peter Grunthal
• Mount Kisco Trustee Karen Schleimer
• Mount Kisco Trustee David Squirrell
• Former Mount Kisco Mayor Michael Cindrich
• Former Mount Kisco Trustee Anthony Markus
• Former Mount Pleasant Town Board Member Francesca Hagadus-McHale
• New Castle Town Supervisor Ivy Pool
• New Castle Deputy Town Supervisor Jeremy Saland
• New Castle Town Board Member Jason Lichenthal
• Former New Castle Town Board Member Hala Makowska
• Former New Castle Town Board Member Jason Chapin
• Former New Castle Town Board Member Elise Mottel
• North Castle Town Supervisor Michael Schiliro
• North Castle Town Board Member José Berra
• North Castle Town Board Member Saleem Hussain
• North Castle Town Board Member Barry Reiter
• Former North Castle Town Supervisor Reese Berman
• Former North Castle Town Clerk Anne Curran
• Former North Castle Town Justice Susan Shimer
• Former Orangetown Supervisor Thom Kleiner
• Ossining Town Supervisor Dana Levenberg
• Village of Ossining Mayor Victoria Gearity
• Peekskill Council Member Dwight Douglas
• Peekskill Council Member Kathleen Talbot
• Peekskill Council Member Patricia Riley
• Rye Town Supervisor Gary Zuckerman
• Rye Town Clerk Hope Vespia 
• White Plains Mayor Tom Roach
• White Plains Council President Nadine Hunt-Robinson
• White Plains Council Member Justin Brasch
• White Plains Council Member John Kirkpatrick
• White Plains Council Member John Martin
• White Plains Council Member Victoria Presser
• White Plains Council Member Jenn Puja
• Former White Plains Council Member Harry Bright
• Former White Plains Council Member Dennis Krolian
• Former White Plains Council Member Rita Malmud
• Former White Plains Council Member Dennis Power
• Former White Plains Council Member Beth Smayda
• Yorktown Town Board Member Vishnu Patel
• Yorktown Town Board Member Alice Roker
• Yorktown Town Clerk Diana Quast
• Former Yorktown Town Supervisor Ilan “Lanny" Gilbert
• College Democrats of New York President Destiny Hallenback
• College Democrats of New York Vice President Lejing Lin

In addition, some groups have given David other types of distinction:

• Greenburgh Democratic Committee: Approved Candidate
• Rye Town Democratic Committee: Approved Candidate
• Cortlandt Democratic Committee: Approved Candidate
• Moms Demand Action: Gun Sense Candidate
• ProChoice Voter: Pro-Choice Candidate