Here's an article from 2018, "All The White Supremacists Running For Office": https://www.huffpost.com/entry/white-supremacists-running-fo... There are 12 candidates listed.
Here's a white supremacist running unopposed for Congress in 2018: https://www.npr.org/2018/02/08/583993705/a-white-supremacist...
In Germany there has recently been an alarming rise in white nationalist political sentiment in large swaths of the country. Here's a list of European white supremacy groups: https://www.counterextremism.com/european-white-supremacy-gr...
(Before you accuse me of shifting the goalposts: I wasn’t clear in my original post. If you can find a presidential election that occurred in the last 20 years in which a white supremacist received more than 0.01% of the popular vote, I’ll stand corrected. You’ll have to go back farther than 2016: I googled every candidate [1] who received more than 0.01% of the popular vote in 2016 and none of them is a white supremacist.)
1. https://transition.fec.gov/pubrec/fe2016/2016presgeresults.p...