The Run The Jewels star has previously spoken out in favour of the Democrat, but this week, he threw his full support behind Sanders after spending time with him one-on-one.

The musician and activist, real name Michael Render, welcomed the Vermont senator during his latest campaign stop and took the 74 year old out for lunch at famous soul food restaurant Busy Bee.

Mike also showed Sanders his local barber shop, before heading to the politician's rally at the Fox Theater, where the hip-hop star took to the podium and listed his reasons for supporting the presidential hopeful.

During his speech, he referenced lyrics from his 2012 song Untitled, in which he raps, "I don't trust the church or the government/A Democrat, a Republican/A pope or a bishop or those other men", and explained, "But after spending five hours with someone who has spent the last 50 years radically fighting for your rights and mine, I can tell you that I am very proud tonight to announce the next president of the United States, Senator Bernie Sanders."

"In my heart of hearts, I truly believe that Senator Bernie Sanders is the right man to lead this country," he added.

Killer Mike's Run The Jewels collaborator, producer/rapper El-P, later took to Twitter to endorse his fellow Brooklyn, New York native, writing, "@BernieSanders any friend of mikes (sic) is a friend of mine."

Killer Mike's interest in politics prompted the rapper to put himself forward as a last-minute candidate for the state representative seat in Georgia's 55th district in June (15). However, he was disqualified from running as he had failed to complete the necessary paperwork, but he made it clear he was interested in a position in public office in the future.

"I am gonna run one day and we will win," he wrote on Twitter. "I really felt it (was) important to draw attention to this race. We have big Problems in education, schools and prison reform in (Georgia) and I wanna see change. I wanna see y'all (sic) active in local politics."