The way things are currently operating, the border is probably the place you have to worry the least as it's staffed by CBP folks which have probably had training: it's the rest of the country with ICE randos running around that seem to be the worrisome areas. Just ask the South Koreans:
* https://www.theguardian.com/global-development/2025/sep/12/s...
> You're better off with white skin and a US passport than with white skin and a British passport, but you're also better off with brown skin and a US passport than brown skin and a British passport […]
Are we talking at the border or the rest of the country? At the border with CBP a US passport would probably be best. With the rest of the country, with ICE, white skin and a British (or any) passports would probably be 'best'.