Eminem stops Vivek Ramaswamy from using 'Lose Yourself' on US presidential campaign trail

Eminem has written to US Republican presidential candidate Vivek Ramaswamy demanding he stop using one of his tracks while on the campaign trail.

In a move that echoes the infamous stoush between New Zealand's National Party and the rapper in a 2014 election campaign advertisement, he asked music rights management service BMI to revoke the licence for use of his song.

"BMI has received a communication from Marshall B. Mathers, III, professionally known as Eminem, objecting to the Vivek Ramaswamy campaign's use of Eminem's musical compositions (the 'Eminem Works') and requesting that BMI remove all Eminem Works from the Agreement," the letter said, as reported by the Daily Mail.

"This letter serves as notice that the Eminem Works are excluded from the Agreement effective immediately."

Ramaswamy went viral for his rendition of 'Lose Yourself' at the Iowa State Fair in the US earlier in August.

In October 2017, a court ruled against National in a copyright stoush over music used in a 2014 election campaign advertisement. Eminem's publishers first filed the lawsuit with the High Court in Wellington in September 2016.

Eight Mile Style claimed a track called 'Eminem Esque' used by National was a rip-off of Eminem's hit 'Lose Yourself'.

The production company was subsequently awarded damages of $600,000 with interest after suing National. The political party appealed and had the penalty dropped down to $225,000 by the Court of Appeal.

When Eminem's team first objected to the use of the song, National's then campaign chair Steven Joyce infamously defended the music's use as being "pretty legal".