PORTLAND, Ore. — A crowd of protesters marched to a county building in southeast Portland on Tuesday night, where a handful of people in masks and all-black outfits threw rocks through windows and lit a small fire inside, marking the 83rd night of protests in Portland that have led to millions of dollars in damage to city property, officials said. Several hundred people participated in the peaceful protest before a smaller group broke off, police said, lighting fires in dumpsters in the street to block traffic and slow down police who later tried to clear the scene. Some sprayed anti-police...