The very first thing we ought to do is repeal the Taft-Hartley Act of 1947
That's the law that makes it illegal for unions to officially participate in a general strike, political strike, or solidarity strike. That's been a price we pay for the legal protections afforded to unions under the NLRA. But there's no reason why it has to be that way.
Repealing those restrictions ought to be the very first thing we do.