More than 150 Maine businesses, mostly in the Portland area, have closed their doors Friday as part of a nationwide economic protest against Immigration and Customs Enforcement, according to local organizers. Keeli Parker of South Portland works in retail. She spoke at a press conference in Portland on Friday. “Today, the working class of Portland has sent a clear message to those in power: Your power is derived from our labor, and we are not afraid to withhold our labor for the safety of our ne