] According to ACLU legal papers, local police, acting at
] the direction of the Secret Service, violated the rights
] of protesters in two ways: people expressing views
] critical of the government were moved further away from
] public officials while those with pro-government views
] were allowed to remain closer; or everyone expressing a
] view was herded into what is commonly known as a
] protest zone, leaving those who merely
] observe, but express no view, to remain closer.  

American Civil Liberties Union : Secret Service Ordered Local Police to Restrict Anti-Bush Protesters at Rallies, ACLU Charges in Unprecedented Nationwide Lawsuit