Eminem
Eminem has slammed Donald Trump in new song Campaign Speech ahead of the third and final presidential debate. Theo Wargo/Getty Images

American rapper Eminem has announced he is putting together a new album after previewing new material in the form of anti-Trump song, Campaign Speech.

The 44-year-old released the eight-minute track on Wednesday (19 October), telling his fans on Twitter: "Don't worry I'm working on an album. Here's something in the meantime".

The acerbic song takes no prisoners as it ponders why people would put Donald Trump in charge of the country, describing the GOP nominee as a "loose cannon with his hand on the button", before sarcastically adding "great idea".

More than a decade ago, the rapper shared a stage with Trump for a spoof presidential election campaign in which Slim Shady was running for the White House.

"I know a winner when I see one, and Donald Trump is telling you right now Slim Shady is a winner," the LA Times reported Trump as stating during the stunt. "He's got brains, he's got guts and he's got Donald Trump's vote."

Clearly the rapper will not be returning the compliment, with his new release leaving fans in no doubt of his voting preferences.

The rapper has not brought out an album since the release of The Marshall Mathers LP 2 in 2013, while fans on Twitter reacted excitedly to the prospect of new material from the songwriter.