Answer:
A.
Bayard Rustin
Step-by-step explanation:
While launching the A. Philip Randolph Institute in 1964, Rustin found himself embroiled in Democratic politics at the 1964 convention in Atlantic City, where he cautioned delegates of the Mississippi Freedom Democratic Party to back down when President Johnson made a deal to seat the state’s conservative wing. Rustin tried articulating his views in a 1965 essay in Harper’s magazine called “From Protest to Politics,” but the damage was done. “You’re a traitor, Bayard!” Mandy Samstein of the SNCC had shouted thus leading to his leave.