Moulton responded on Thursday, tweeting only the wide-eyed emoji at the tweet, which Felice appears to have later deleted.

According to screenshots of the exchange, Steven Felice called Moulton a “scumbag” and told him to “watch your back at every turn” in a message on Wednesday.

Massachusetts Congressman Seth Moulton’s office said it has contacted US Capitol Police after a man claiming to be a New Jersey police officer threatened Moulton on Twitter.

Moulton’s spokeswoman on Friday would not say whether the two men know each other or whether he has contacted Moulton in any other way.

Felice, who later deleted his entire Twitter account, also appears to have tweeted angry and threatening messages at a host of other public figures, including former president Barack Obama, former Democratic presidential nominee Hillary Clinton, CNN correspondent Jake Tapper, and US Senator Elizabeth Warren.


At President Trump, Felice tweeted, “I know you will make America Great Again!!!!!!!!!!!!!!!.”

Moulton, a second-term congressman from Salem who served four tours in Iraq in the Marine Corps, has publicly criticized Trump.

On Facebook as of Friday morning, Felice said he was an officer at the Elmer Borough (N.J.) Police Department. On Friday afternoon, his profile no longer listed his occupation.

The website of the Elmer Borough Police Department listed Steven J. Felice as a lieutenant. A call to that department was not returned Friday. Felice did not respond to a Facebook message seeking comment.

Laura Krantz can be reached at laura.krantz@globe.com. Follow her on Twitter @laurakrantz.