As of 2023, judging from the CPNN article about the national peace mobilization of March 18, the peace movement in the United States is very weak. The sponsors wrote that “This is the first time in many years that then entire U.S, antiwar movement has been able to get together and build a national action. This is a very important step forward for our movement.” But only about 2500 people showed up according to the note at the end of the article.
Here are CPNN articles pertaining to this question:
National March on Washington March 18 : Peace in Ukraine
Say NO to U.S. wars! Actions took place in more than 70 areas across the US and Canada
Committee for a SANE U.S.-China Policy
United States : There Are Anti-War Candidates
US: The United National AntiWar Coalition Call to Action
Campaign Nonviolence Action Week, September 14-22
World BEYOND War annual global conference, Toronto, September 21-22
USA: Trump Parade Canceled — Peace Parade Goes Forward
Campaign Nonviolence National Convergence in Washington, DC this September 21-22, 2018
Baltimore, USA: Conference on US foreign military bases
Conference on U.S. Foreign Military Bases , Jan 12-14 in Baltimore, USA
USA: Sign The People’s Peace Treaty with North Korea
USA: Campaign Nonviolence Organizes over 1,600 events for Week of Actions
USA: Campaign Nonviolence Mounts Nationwide “Week of Actions” September 16-24, 2017
USA: United National Anti-War Coalition (UNAC) conference
600+ Campaign Nonviolence Events Across USA Next Week!
USA: World Beyond War conference
USA: Five Years After Occupy Wall Street, Bernie Sanders Continues Its Fight
The U.S. Has a Representative Government: The Conference of Mayors
Connecticut Advances Conversion from War to Peace Economy