One of the candidates challenging Elizabeth Warren for her U.S. Senate seat has filed a federal lawsuit against the City of Cambridge accusing it of violating his First Amendment rights. His campaign was asked to move or get rid of the racially charged slogan “Only A Real Indian Can Defeat The Fake Indian” draped over his campaign bus, which was parked at an office building he owned.

Shiva Ayyadurai, who Boston magazine dubbed “The Shock Candidate” in a profile last summer, graduated from MIT, where he was once a liberal activist. Now he campaigns from a refurbished school bus with slogans painted on it. Ayyadurai and his campaign filed the case in U.S. District Court in Boston on April 22.

Read the full article at the Cambridge Patch website.