Define 'citation', write a long essay about your criteria for accepting citations, maybe supply an appendix outlining your epistemological views so people know exactly what sort of citations you'll consider acceptable.

See, two can play at that game.

wtf?

It's not some "gotcha game".

If the claim is [Donald Trump supports and advocates for ethno-nationalists causes] ...

I'd like to a source for that claim because it seems like Orange Man Bad delusions, but I'm willing to remain open minded if someone can provide a citation!

And I'd like to know what your standards are so I don't waste my time selecting and offering sources only to have them dismissed because you consider them deficient.

Since you already incline to the view that such assertions are delusional and employ a common political trope to characterize such delusions, I feel nagging doubts about your purported open-mindedness. Discussions like this generally devolve into pedantic quibbling which would be a waste of both your time and mine.

You can be as wordy as you like; Show me where Trump supports and advances an ethno-state.

Sure, once you've said what sort of citations you'll accept. Until then, no.