It started Friday afternoon when a group of about 150 clad in white polos and white dresses formed a marching column called a “white bloc” — a response to the “black bloc” uniforms of anarcho-communist group Antifa — at MacGuffey Art Center and marched in military formation to Jackson Park where they turned about face to greet featured speakers Richard Spencer, Sam Dickson, Nathan Damigo and Mike Peinovich.