PORTLAND, MAINE - MAY 1: U.S. House candidate from Maine Matt Dunlap (L) and U.S. Senate candidate from Maine Graham Platner (C) during a May Day rally organized by local unions, on May 1, 2026 outside City Hall in Portland, Maine. Platner joined the Maine Service Employees Association SEIU 1989 demonstration to honor the labor rights movement as he campaigns to be the Democratic nominee ahead of the June primary. (Photo by Graeme Sloan/Getty Images)