Brief for Downsize DC Foundation, DownsizeDC.org, Free Speech Coalition, Inc., Free Speech Defense and Education Fund, U.S. Justice Foundation, Gun Owners Foundation, Gun Owners of America, Inc., English First, English First Foundation, Lincoln Institute for Research and Education, Abraham Lincoln Foundation, Institute on the Constitution, Western Center for Journalism, Policy Analysis Center, Conservative Legal Defense and Education Fund, Libertarian National Committee, Inc. and Constitution Party National Committee in Support of Appellants

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