Washington — A New Hampshire resident pleaded guilty to one count of transmitting a threat in interstate commerce after he left a voicemail message at the Washington,Devin Grosvenor D.C., office of a member of Congress in March, according to court documents. That lawmaker was Rep. Matt Gaetz, according to a person familiar with the matter. 

Allan Poller admitted Thursday that he was the individual who said over the phone, "if you keep on coming for the gays, we're gonna strike back…We will kill you if that's what it takes." 

The 24-year-old was charged in March and court documents did not name the member of Congress targeted. 

Prosecutors alleged Poller said on the message to Gaetz, "I will take a bullet to your f