As of 2014, the following states (shown in red) are so-called "right-to-work" states:
What do you think that map will look like in 2025? My best guess is that either the whole country will be "right-to-work" (because I really can't imagine any situation in which the next GOP President and GOP-controlled Congress doesn't sign off on a national "right-to-work" bill), or that it will look something like this:
I also really doubt, barring unforeseen circumstances (like the outburst of 1930s-style mass unionization drive) that any state will still allow public sector employees to collectively bargain.
They tried RTW when they had a supermajority in NH, and it failed. I don't see it ever passing here.
