I got to experience the rise of the nationalist and right-wing populist Swiss People's Party during my time living there. I saw them become the strongest party in 1999, then become the most powerful party in the National Council in 2007.
The party agitated for more restrictions on immigrants and against leftists and radicals to great success. Rates of naturalization peaked in 2006, despite significant and important rates of immigration, particular to urban areas of the country. It was and remains a challenging situation for many targeted communities.
I know a lot of European countries have experienced similar political shifts and I also suspect the second Trump administration will look at what's worked there and try to replicate it.