The one thing that may happen, and I hope not. The US will impost tariffs on Thailand. The Thai government will start a scathing attack on the US because if it. All visas will be canceled. Including retirement visas, tourist visas, All. If not then the anti US sentiment will force retiree's and tourists to leave Thailand as the public outrage will force them out.
It would not take much to whip the Thai citizens into an anti US frenzy. The last time I was there it was heading that way pretty fast anyway.