Canadian man says U.S. border officers made him give DNA sample

The original Substack piece:

https://news.ycombinator.com/item?id=47548420

Ok, from the title, asking for DNA might be too much.

> He says he wanted to join Americans at the “No Kings” rally .

> Larson said he felt there was a good chance he’d be turned away at the border, “but I didn't expect the treatment that I got,”

OK, what did he expect by explicitly stating that he wanted to bring disruption to a country?

However you feel about the US situation, I think any border agent in the world would consider you a liability if you explicitly state that you want to take part in a demonstration against the elected government.