An independent Senate candidate in Massachusetts is suing to keep his sign calling Democratic Sen. Elizabeth Warren a “fake Indian” in place.

Shiva Ayyadurai is suing the city of Cambridge after he was told to remove two signs with Warren wearing an Indian headdress, the Washington Times reported.

The signs are placed on both sides of a school bus in front of Ayyadurai’s office and read “Only a real Indian can defeat the fake Indian.” Ayyadurai was born in Mumbai, India.

The jibe comes from her 2012 Senate campaign when critics seized upon Warren’s claiming Cherokee heritage when she was a law professor.

President Donald Trump has raised the history when he has called the liberal favorite “Pocahontas” as a slur.