Republican Congressman Steve King retweeted Mark Collett, who has described himself as a "Nazi sympathizer," on Tuesday, sparking a storm among social media users.
"Europe is waking up… Will America… in time?" King wrote, with a link to Collett's anti-immigration tweet published earlier.
Collett is one of the most infamous Neo-Nazis in the UK and has expressed his understanding for Adolf Hitler.
King has repeatedly come under fire due to his racist and discriminatory remarks.
In 2017, King cited right-wing Dutch politician Geert Wilders' as a role model, saying that he "understands that culture and demographics are our destiny. We can't restore our civilization with somebody else's babies."