Barnstable Police said the incident Tuesday afternoon led to the arrest of Bladen Tisdell, 32, on charges of assault and battery on a person over 60 years old and disorderly conduct.
The arrest came after officers showed up at Osterville Fire Department in response to a report of a fight, according to CBS 4 Boston.
The man who complained told police he was holding up the "Trump 2020" sign when Tisdell pulled up next to him in his pickup, the station reported.