Chart Data reported Monday that the song was already in the British Top 20.
The song has strong political roots and was originally written in part about President George W. Bush. So far, it seems to be working.
The campaign asks people to download "American Idiot" between Friday, July 6, and Friday, July 13, to push the 14-year-old single to the top of the Official UK Charts. But the Brits have been waging campaigns to get certain songs to chart for a decade.
Every so often, a percentage of the British population bands together to ensure that some album or song gets to number one by a particular date.
A Twitter account created to increase the song's popularity ahead of Trump's visit indicated over the weekend that the track was a top-10 seller on iTunes, as well.
But when Trump arrives in the United Kingdom this week for meetings with Prime Minister Theresa May and the queen, among others, the president may have a different view of the Green Day anti-establishment anthem.
So far the push is working - it is now sitting at number 18 thanks to the help of protesters sharing the #MAIGA (Make American Idiot Great Again) message on social media.
American Idiot was a huge hit for Green Day when it came out in 2004, targeting the George W Bush administration, it was released a year after the USA invaded Iraq. (No. 61, though it topped the genre-rock chart).