The Drudge Report quoted government sources saying an interview with Eminem is imminent.
A track by the rapper that appeared on the Internet called "We As Americans," includes the lines:
"I don't rap for dead presidents/I'd rather see the president dead/It's never been said, but I set precedents and the standards, and they can't stand it!"
The source told Drudge he found the rap "alarming and reckless," but it had not been decided whether it constitutes a direct threat against the president.
A spokesman Eminem's label, Interscope, claims the cut is an "an unfinished song that was either lost or stolen, and there was no determination when, where, how or if it was going to be used," Drudge said.