Doubt that it's possible? It's already exactly this easy:
OFFICER: Stop, you are under arrest for being an illegal immigrant.
YOU: But officer, I'm a citizen. Here's my driver's license.
OFFICER: I think that looks fake. You are an illegal. Get in the van.
YOU: But this van says "Alligator Alcatraz" on the side and don't I have a right to see a lawyer??
OFFICER: [Fingers taser] Nope. I say you're an illegal. Get in the van.
Think that's an overstatement?
https://www.miamiherald.com/news/local/immigration/article311554316.html