But in 1925, in Gitlow, SCOTUS confronts whether a state can restrict free speech. This was the birth of incorporation: the first 10 amendments are applicable against the states. This is a big expansion of federal power, obviously. It still took a while to get things going: all the big criminal procedure cases (Miranda, e.g.) spring from this. It's hard to really challenge it, also, because the federal courts are the final arbiters of the doctrine.
Irony: the federal courts are always complaining about being overloaded. But federal jurisdiction keeps expanding. Still, if they just renounce incorporation, and let states decide their own bills of rights, their dockets get a lot more manageable. Right now something like 85% of the cases in a standard crim pro casebook are federal courts deciding state law-- that's really clogging up the works.
But anyway, the doctrine of incorporation is clear and settled at this point.
Hughes argues that he has a federal constitutional right to present his case. Federal court (7 Cir) agrees: procedural due process.
But then there's back-and-forth. And a different 7th panel says WI is not constitutionally obliged to admit the testimony. Petition for cert: denied. So we are in limbo in that respect, to this day. We've got 2 7th circuit panels disagreed with one another.