The sound of a protest outside her window wakes Brennah Hammar in the middle of the night. Tear-gas creeps into her apartment complex, Gray's Landing, which is located across from an Immigration and Customs Enforcement (ICE) building in Portland's South Waterfront neighbourhood. For months, the area has become the site of nightly clashes between federal agents and protesters, dressed in black, who are opposed to immigration arrests. "It's like a war zone," Ms Hammar, 57, says about her street.