No, it’s any reason as long as it’s discriminatory:
“At-will employment is a term used in U.S. labor law for contractual relationships in which an employee can be dismissed by an employer for any reason (that is, without having to establish "just cause" for termination), and without warning”
“At-will employment is a term used in U.S. labor law for contractual relationships in which an employee can be dismissed by an employer for any reason (that is, without having to establish "just cause" for termination), and without warning”
https://en.m.wikipedia.org/wiki/At-will_employment
I can fire you for being a fan of the Raiders because I am a fan of the Chargers.