Possibly, but given that employment is fundamentally at-will, there's a *very* high factual bar to clear in claims of wrongful termination. In particular, most states *do not* make political opinions a protected class with regard to discrimination, so which completely takes the legs out from such a claim in a way that can't really be sidestepped by resorting to an alternate claim of defamation.
And you absolutely could not force Disney to produce Rangers of the New Republic as a court ordered remedy unless you not only proved discrimination, but also proved that said discrimination was the *sole and only* reason they cancelled the show, which would be pretty much an impossible burden.