"The Capitol buildings and grounds are quintessential places for free speech and protest, accessible by people from all walks of life who gather there to express their views, demonstrate, picket, and hold vigils."

"But if those places are permanently fenced off, the public and our constitutional right to assemble and protest will be in jeopardy. That is why the ACLU and the ACLU of the District of Columbia are urging leaders of the U.S. House and U.S. Senate not to permanently fence off the Capitol, which would turn its architecture into a national symbol of fear and hostility towards the public’s presence.... The Capitol complex, where all our elected lawmakers come together to legislate in the open view of the public, has been recognized around the world as a celebrated symbol of democracy. If Congress were to permanently retreat into a militarized zone ringed by fencing topped with razor wire, it would send the kind of message that heads of autocratic regimes send by cloistering themselves away from their populaces in armored fortresses.... The public will suffer diminished access to public grounds with unique importance in the exercise of their constitutional rights to assemble and to petition the government. That exclusion will be especially acute if people want to participate in spontaneous protest in response to rapidly unfolding events—such as the protests for racial justice that arose last summer...."

From the ACLU website.