PORTLAND, MAINE - MAY 1: U.S. House candidate from Maine Matt Dunlap applauds during a May Day rally organized by local unions, on May 1, 2026 outside City Hall in Portland, Maine. U.S. Senate candidate from Maine Graham Platner (not-pictured) 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)

PITTSBURGH, PENNSYLVANIA - MAY 1: Mitch Keller #23 of the Pittsburgh Pirates pitches during the first inning against the Cincinnati Reds at PNC Park on May 1, 2026 in Pittsburgh, Pennsylvania. (Photo by Joe Sargent/Getty Images)

PORTLAND, MAINE - MAY 1: U.S. House candidate from Maine Matt Dunlap (L) and U.S. Senate candidate from Maine Graham Platner (C) cheer 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)

PORTLAND, MAINE - MAY 1: U.S. Senate candidate from Maine Graham Platner cheers (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)

PORTLAND, MAINE - MAY 1: Demonstrators cheer during a May Day rally organized by local unions, on May 1, 2026 outside City Hall in Portland, Maine. U.S. Senate candidate from Maine Graham Platner (not-pictured) 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)

PITTSBURGH, PENNSYLVANIA - MAY 1: Brady Singer #51 of the Cincinnati Reds pitches during the first inning against the Pittsburgh Pirates at PNC Park on May 1, 2026 in Pittsburgh, Pennsylvania. (Photo by Joe Sargent/Getty Images)

PITTSBURGH, PENNSYLVANIA - MAY 1: Brady Singer #51 of the Cincinnati Reds pitches during the first inning against the Pittsburgh Pirates at PNC Park on May 1, 2026 in Pittsburgh, Pennsylvania. (Photo by Joe Sargent/Getty Images)

PORTLAND, MAINE - MAY 1: U.S. Senate candidate from Maine Graham Platner greets attendees 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)