An activist who runs for or holds political office, especially one who uses their political power to promote or achieve progressive or social reforms.
Etymology: portmanteau of politician and activist, coined by Rep. Cori Bush.
'“I don’t plan to be in Congress for the rest of my life,” Cori Bush said. She hopes instead to be a politician/activist: “a politivist — I’m coining that!” Someone who never stops her work on the ground, but who also can deftly navigate the system of government we have (rather than blowing it up) to enact police reform and give protection to protesters.' (Washington Post, December 22, 2020)