Such as? If you think Trump is specifically going to sign some sort of anti-Kpop bill, you've lost (the remainder of) your marbles. You're just using him for petty scaremongering, while Americans have very real concerns & fears right now. It's like someone in the 1930s proposing that Hitler is going to cancel saturday morning cartoons.
All Trump has to do to weaken KPop is to strengthen visa requirements for KPop singers, making it much, much harder for them to enter USA for concerts.
People with citizenships in Five Eyes, such as Roseanne Park , MBE, Christopher Bang, Felix Lee, Pham Ngoc Han or Danielle Marsh could be allowed somewhat better terms, but none of the BTS members qualify.