That means repealing four federal statutes: the Wagner Act, Norris–La Guardia, Taft-Hartley, and David-Bacon. Do all of that and we're back to a sane state of affairs where you can join a union if you want to, and the employer is free to either contract with your union or hire somebody else.
Do all of that and we're back to a sane state of affairs where you can join a union if you want to, and the employer is free to either contract with your union or hire somebody else.
With one caveat. The employer may not fund or operate his own "union" as it makes a mockery of free association.