Former leader of the Ku Klux Klan David Duke leaves the Louisiana Secretary of State's office after filing to run as a Republican for United States Senate in Baton Rouge, Louisiana, U.S. July 22, 2016. REUTERS/Bryn Stole Former Ku Klux Klan grand wizard David Duke celebrated Donald Trump's win on Twitter on election night.

The Republican presidential nominee became the 45th president-elect shortly before 3 a.m. on Wednesday.

"This is one of the most exciting nights of my life," Duke tweeted. "Make no mistake about it, our people have played a HUGE role in electing Trump!"

Duke, a former member of the Louisiana House of Representatives, was also running for Senate this year. He lost his race in Louisiana.

Trump has previously denounced Duke and the KKK, but that hasn't stopped Duke from supporting him.