How was this law not struck down 45 years ago?
Those workers enter and leave those fields daily, saying that people can access private property without property owners approval if they are a union organizer is unconstitutional..
Private property is private property.
Easy. The Supreme Court has been dominated by the Progressive ideology for at least 80 years, since 1937.
We now have, for the first time in 80 years, a majority of the Court that at least claims it adhears to originalism and textualism.
They are struggling with 80 years of precedent set by doctrinaire Progressives who believe the Constitution means whatever the people on the Court want it to mean, at any time.