PORTLAND, Ore. (AP) — A gas mask dangled from Deidra Watts's backpack as she joined a couple dozen others outside the U.S. Immigration and Customs Enforcement building in Portland, just as she has many nights since July.

The protesters toed a blue line painted across the building's driveway. “GOVERNMENT PROPERTY DO NOT BLOCK,” read its white, stenciled letters. When they lingered too close, what appeared to be pepper balls rained down on them from officers posted on the building's roof.

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