Antifa activated.
Arrests Made as Right-Wing Protesters, Anti-Fascists Fight in Portland Streets
Tensions between a protest by the right-wing Patriot Prayer group and anti-fascist activists in downtown Portland descended into violence Saturday. The two sides appeared to be itching for a fight from the beginning and in the end Portland Police declared a riot and arrested at least four people.
https://slate.com/news-and-politics/2018/07/patriot-prayer-rally-arrests-made-as-right-wing-protesters-anti-fascists-fight-in-portland-streets.html