Portland standoff with US agents ongoing after mayor gassed

A waste receptacle was moved into the intersection of SW 3rd and Main and its contents set on fire as Portland protesters gathered downtown on July 10. (Dave Killen/The Oregonian via AP)

PORTLAND, Ore. — The tense standoff between demonstrators and federal police dispatched to Portland, Oregon, dragged on Thursday after the city’s mayor was tear-gassed by U.S. government agents as he made an appearance outside a federal courthouse during raucous protests.