Wolfgang is again correct.

OED: early 19thC; from the name of Gov. Elbridge Gerry of Mass. + salamander, from the supposed similarity between a salamander & the shape of a new voting district on a map drawn when he was in office (1812), the creation of which was felt to favour his party. The map (with claws, wings, & fangs added) was published in the Boston Weekly Messenger with the titleThe Gerry-Mander.