Seattle Police officers monitor Seattle's Westlake Center as crowds of Pro-Trump and Anti-Trump protesters gather on Monday May 1, 2017.
CeAtl Tonalli dancers perform songs and dance leading the front of the Workers and Immigrant Rights march in Seattle during May Day on Monday May 1, 2017.
Pro-Trump and Anti-Trump protesters share "peace joints" , rolled on the back of a protest sign, during a May Day protest in Seattle on Monday May 1, 2017.
Protesters at Seattle's Womxn's March, held in solidarity with the Washington D.C. Women's March, sit along the fountain at the Seattle Center on Saturday January 21, 2017. As the front of the march reached the Seattle Center the tail end was just making their way from the starting point at Judkins Park, nearly four miles away.
Protesters use a milk solution to wash pepper spray off of another protester’s face and eyes during the Seattle’s Anti-Capitalism march on Sunday, May 1, 2016.
Anti-Capitalism protesters walk through smoke clouds left by flash-bang grenades thrown by Seattle police outside of Century Link field during the May Day marches on Sunday evening, May 1, 2016.
Seattle protesters kneel with their hands up during Seattle's Black Friday march following the decision of the Michael Brown case in Ferguson, Missouri on Nov. 28, 2014.
An anti-capitalism protester is arrested outside of a Seattle Costco as the May Day march comes to a close Sunday evening, May 1, 2016.
Protesters stage a "die in" in the KOMO News plaza during a demonstration for Palestine in Seattle, Wash. on July 26, 2014.
A lone protester kneels in front of a police barricade during the Seattle Black Friday protest on Friday Nov. 28, 2014.
A protester faces off with a Seattle Police Officer during Seattle's Black Friday protests Nov. 28, 2014.
A Seattle resident watches from her yard as protesters march through Seattle streets on May 1, 2015.
Masked protesters and anarchists clash with police during the annual Anti-Capitalism protest in Seattle, Wash on May 1, 2015. The police began deploying flash-bang grenades to push back the crowds.
Seattle police detain a marcher from the annual Anti-Capitalist protest turned riot on May 1, 2015.
A protester was hit in the back by shrapnel from a flash-bang grenade thrown by Seattle police during the annual Anti-Capitalist protest turned riot on May 1, 2015.
A Bellingham police officer inspects a cracked windshield on a cruiser following the Bellingham Block Party riot Saturday night, Oct. 12, 2013.