Blue Light Federalists
Blue Light Federalists were members of the Federalist Party in New England who were alleged to have collaborated with the Royal Navy during the War of 1812. They supposedly used blue lanterns to alert British warships to American blockade runners, earning the name "blue light." The term was later applied more broadly by war hawks in the Democratic-Republican Party to refer to all Federalist opponents of the war, including tax protesters and secessionists.