Story highlights

Jules Manson is a onetime city council candidate

He threatened Obama in a Facebook posting

Manson says he was "not in the right state of mind"

(CNN) —  

The U.S. Secret Service said Wednesday it was following up after a California man used Facebook to make a profane threat against President Barack Obama.

“Assassinate the f—— n—– and his monkey children,” Jules Manson, 48, a onetime candidate for the Carson, California, City Council, wrote on Facebook Sunday, according to CNN affiliate KTLA.

Manson told the station he was angry when he wrote the post, “and I just wanted to spew out the most vile, hateful things toward him. That’s all I was doing.”

“We are aware of this matter and are taking appropriate follow-up,” Secret Service spokesman Max Milien told CNN. He would not comment on the investigation.

Manson was reacting to a post about Obama signing the National Defense Authorization Act, KTLA said.

The act outlines defense spending priorities. Manson, a Libertarian, believes the law tramples citizens’ constitutional rights in the name of fighting terror, KTLA reported.

“There was no substance behind what I said,” Manson told the station. “I’m not the least bit racist at all. I was just trying to muster the most hateful words I could find.”

He told KTLA that Secret Service agents showed up at his mobile home and searched the residence, his car and a computer, and were interviewing his friends and relatives.

“I was not in the right state of mind,” when he made the posting, Manson told the station. “I was very angry when I made those statements.” Asked what he has learned, he said, “to think before you talk. … Never make statements unless you’re in the right state of mind.”

Manson ran for the city council seat in March, KTLA said, and finished last out of five candidates running for two available seats. During the campaign, he criticized the city’s “fascist policies,” according to KTLA.

CNN’s Lesa Jansen contributed to this report.