The nationwide “No Kings” rally held on June 14, 2025 (coinciding with Trump’s 79th birthday and a high-dollar military parade in Washington, D.C.) was organized by the grassroots 50501 Movement (short for “50 protests, 50 states, 1 movement”) thecut.com+15apnews.com+15timesofindia.indiatimes.com+15.
They teamed up with a coalition of like-minded groups, including:
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MoveOn, whose spokesperson Joel Payne highlighted Philadelphia as the flagship event hub npr.org+1thecut.com+1
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ACLU and Indivisible, who also publicly backed the protests elpais.com+1cbs6albany.com+1
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American Federation of Teachers (AFT), whose president Randi Weingarten participated in the Philadelphia rally pbs.org+12npr.org+12nypost.com+12
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Local organizations such as 50501 chapters and groups like Bay City Resistance, Defend Democracy ICT in Wichita, and 50‑50‑1 Vermont mysanantonio.com+8en.wikipedia.org+8kansas.com+8
In some areas (San Antonio, for example), Women’s March collaborated with the 50501 Movement as joint organizers mysanantonio.com.
So in summary, while 50501 served as the movement’s driving force, it was supported on the ground by a broad coalition of grassroots and institutional groups working together to stage peaceful protests across all 50 states.