Or hours reduced to part-time, or salary cut. As long as they don't try to do this retroactively, or cut your wage below the state minimum, it's not illegal for employers to do that in the US. Fortunately for the rest of the world, the US laws are quite less favorable to employees than many other countries.

Just set your VPN to an EU zone country and google "unlawful termination" if you're from the US / set your VPN to US if from EU, and read for some eye-openers!