What happens to USDT if USD crashes?

Good day, esteemed professional. I'm quite fascinated by the world of cryptocurrencies and finance, but I have a nagging doubt that's been bugging me. Given the volatile nature of the market, I'm particularly curious about what would happen to USDT, or Tether, in the event of a crash in the value of the US dollar. Would the pegged relationship between USDT and the USD still hold firm? Or would USDT's value be significantly impacted, potentially leading to a decoupling from the dollar? Your insights would be greatly appreciated.