A campaign sign for Representative Josh Gottheimer and the home of one of his supporters were defaced with swastikas, profanity and racial epithets in Hampton Township, N.J., early Saturday morning.

The sign, a large banner, was defaced with anti-Semitic and racist remarks written in black spray paint. “Vote MAGA, Libs suck. Go to CALI Dems,” was scrawled across the other side of the sign, which supported the re-election of Mr. Gottheimer, a Democrat.

The home was also vandalized with a large swastika painted on the garage door. Bright yellow Weichert real estate broker signs on an adjacent property were also vandalized with swastikas and male genitalia, as was a nearby road sign.

“We were first alerted by a text from our neighbor,” said Adam Stolarsky, 48, who lives in the house with his girlfriend, Colleen Murch.