Eminem has an ultimatum for his fans – to support either him or US President Donald Trump. 

Yesterday, full-time life guru and part-time music producer DJ Khaled announced that Eminem would be freestyling during the BET Hip-Hop Awards. And, sure enough the 'Rap God' appeared in a multi-story car park surrounded by his entourage. He started off by slowly moving towards the camera, declaring this was the "calm before the storm".

© Billboard

Eminem verbally eviscerated Donald Trump in this 4-minute rap filmed in a Detroit carpark and was broadcasted at the Award Show. 

You can literally hear so much anger in the rapper's voice as he proceeds to comment on all the social and political issues. He gives props to Obama, and talks about Trump's current reign, the take a knee protests, tensions between the US and North Korea, and the treatment of different races.

© Billboard

“But we better give Obama props, Cause what we've got in office now's, A kamikaze that'll probably cause a nuclear holocaust,” he rapped.

Referencing the orange superhero the Thing from the Fantastic Four comic books, he raps: “Racism's the only thing he's Fantastic Four / Cause that's how he gets his fucking rocks off and he's orange.”

© Fox studios

He concluded the fiery freestyle by talking about Trump's plans to build a wall between the US and Mexico, as well as addressing his fans who may support him. 

“Well if he does build it, I hope it's rock solid with bricks, 'cause like him and politics I'm using all of his tricks, 'cause I'm throwing that piece of shit against the wall 'till it sticks.

And any fan of mine who's a supporter of his I'm drawing in the sand a line, you're either for or against, and if you can't decide who you like more in your spilt, or who you should stand beside, I'll do it for you with this... **** you.”

© Billboard

Eminem has always been vocal about his criticism of Trump, and with this rap, he even put his support behind the player Colin Kaepernick, who was first to take a knee which inspired widespread protests that have extended outside of football and enraged Trump in the process. 

Kaepernick was quick with his response. 

I appreciate you @Eminem âð¾ pic.twitter.com/nwavBwsOkQ

— Colin Kaepernick (@Kaepernick7) October 11, 2017

Eminem was trending on Twitter in no time, with a lot of people, including numerous celebrities, showing support. 

Racism is the only thing he's Fantastic 4(fantastic for), cause that's how he gets his rock off, he's orange. Sheesh @Eminem!! ð¥ð¥âð¾ð¥ð¥#United pic.twitter.com/wcL28BCWpy

— LeBron James (@KingJames) October 11, 2017

Snoop Dogg salutes Eminem ð¯ @SnoopDogg @Eminem pic.twitter.com/aUWhOnbcMt

— WORLDSTARHIPHOP (@WORLDSTAR) October 11, 2017

.@Eminem killed this shit!!! **** that! This is for Collin ball up a fist!!! âð¿ pic.twitter.com/RF4jQ4LN2z

— Sean Diddy Combs (@diddy) October 11, 2017

Whoa. Rap God. @Eminem  thank you. Potentttt

— J. Cole (@JColeNC) October 11, 2017

Here's the whole video: