"Personally, I believe in the light of King's powerful demagogic speech yesterday he stands head and shoulders over all other Negroid leaders put together when it comes to influencing great masses of Negroes. We must mark him now, if we have not done so before, as the most dangerous Negro of the future in this Nation from the standpoint of communism, the Negro, and national security."
FBI Deputy Director William Sullivan, after watching the "I have a Dream" speech.