We will see how trade negotiations go and if the $280 Strad stays at $280. My guess is that brass instruments aren't high on the list.
From Dun & Bradstreet: "Imports account for 55% of the US market. The largest supplier to the US is China, which accounted for more than 40% of imports in 2017. .."
This is for all musical instruments, not just trumpets.
Lets not lose sight of the ACB video that was talking about counterfeit Strads. I'm sure Conn-Selmer should have a right to protect their brand from criminals.