“I do apologize – not necessarily to the President – but on behalf of much better men than myself,” said Nugent on conservative radio host Ben Ferguson’s show, according to reports.
Later during the interview, Nugent clarified that his apology extended to the president.
"I apologize for using the term," he said. "I will try to elevate my vernacular to the level of those great men that I'm learning from in the world of politics."
Nugent’s language sparked controversy with several Republicans urging him to offer an apology.
Sen. Rand Paul of Kentucky posted on Twitter late Thursday that "Nugent's derogatory description of President Obama is offensive and has no place in politics." The lawmaker said he should apologize.
Nugent's comment, which originated from a January interview, resurfaced after the rocker had campaigned in recent days with Texas Republican Attorney General Greg Abbott.
Abbott, who is running for governor, has sidestepped questions regarding the controversial musician but has quietly removed him from the campaign trail, the conservative website Newsmax reported.
Texas Republican Gov. Rick Perry told CNN Thursday that he had a "problem" with the rocker's "tough words."
"He shouldn’t have said that about the president of the United States,” Perry said. "That is an inappropriate thing to say.”
The governor said he would "recommend" to Nugent that he apologize.
"We’ve all said things that we would like to reel back in; I suggest to you this was probably one of those for him," he said.
Sen. Ted Cruz, R-Texas, when asked by CNN Thursday about Nugent's comments, initially sidestepped the question. But when pressed by reporter Dana Bash, the Tea Party favorite finally said "of course I don't agree with them."
"You've never heard me say such a thing, nor would I," he said
Nugent’s comments were made in an interview with the pro gun-rights website Guns.com.
"I have obviously failed to galvanize and prod, if not shame, enough Americans to be ever vigilant not to let a Chicago communist-raised, communist-educated, communist-nurtured subhuman mongrel like the ACORN community organizer gangster Barack Hussein Obama to weasel his way into the top office of authority in the United States of America," Nugent said.
Nugent, 65, has a history of uttering controversial comments, particularly those against women. He has called former Secretary of State Hillary Clinton a "worthless b***h," feminists "fat pig[s]" and former Attorney General Janet Reno and gun-control advocate Sarah Brady "dirty whore[s]."