An 81-year-old man was assaulted in a ShopRite in New Jersey — because he was wearing a “Make America Great Again” hat, authorities said Tuesday.

The victim was confronted by an unknown man over the hat just before 3:30 p.m. Monday in Franklin Township in Somerset County, officials said.

County authorities, who are working with local cops on the investigation, would not release any further details.

The injured man, who is a Franklin Township resident, refused medical treatment.