Depends on the state where OP lives. In Florida a boss fired several people for wearing the same color shirts (they were wanting to know who was going to lunch and the boss though that they were having some kind of protest.).

#31, even better, you can be fired without any cause at all in Texas! Giving a silly "cause" like lack of cookies can be the basis of a lawsuit, but firing without cause is indisputable.

"Because I wanted him gone" should be ground for termination everywhere. So many work places have that super lazy douche who pawns work off on everyone else, never showers and makes annoying jokes while people are trying to work. The only reason he's there is to prevent the lawsuit firing him would cause. At will employment solves that problem.

Unfortunately, that means you can be a really good worker and still get fired because your boss is a jerk, or he wanted a position open for his son/nephew, etc. "Right to work" creates more problems than it solves. If a company really wants to get rid of someone for cause, even in a non-right to work state, it's not that hard. They simply have to document the issue.

The OP is a male.

You don't think ruining a marriage (assuming the boss is even in one) is a little on the excessive side?