I think we could all agree by calling it a work-stoppage. To me they're basically all the same but a strike is generally a work stoppage intended to force management to in some way improve the employment environment whereas a political protest can and usually is directed outwards and occurs for any number of reasons.
> a strike is generally a work stoppage intended to force management to in some way
This is also a political protest. Just because it's not against the U.S. government doesn't make it less so.
There's nothing political about a contractual dispute between two private parties.