What law would be so dumb as to force an American browser to include malicious CAs, publically, and not also force everyone to only use those American browsers?
In your imagined dystopia what you're talking about doing (using a browser with safe CAs) would be illegal no matter where the browser really comes from.
It's no different with locked-down phones/tablets where it's illegal to root it. You don't need to force everyone, just people using American ISPs/carriers.
In your imagined dystopia what you're talking about doing (using a browser with safe CAs) would be illegal no matter where the browser really comes from.