BIDDEFORD, Maine — The Dropkick Murphys paid tribute to Maine Senate nominee Troy Jackson on Friday night with a rendition of their most famous Celtic punk rock song, singing that “Troy’s shipping up to D.C.” to a crowd of supporters.

The song, a riff on the Massachusetts-based band’s “I’m Shipping Up To Boston,” was part of a union-sponsored event for Jackson, the Democrat challenging Sen. Susan Collins (R-ME) in Maine.

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