2) the fuck are you talking about
That which you are apparently ignorant about, but about which Ip've gone to the capitol itself and certainly logged in the phone hours campaigning to end: the exception clause. With some success, I might add. I was involved one way or another with the campaigns in Utah, Alabama, Oregon, Tennessee, and Vermont, and I'm proud of that.
It's astonishing that you are so unaware of your own country's laws as to not know what I am referring to.
Alternatively, perhaps you could consider attempting to be just a teensy bit less egotistical? Slavery isn't legal in the US to the best of my knowledge.
Then your knowledge is perilously wrong. Yes, chattel slavery for general commercial is illegal, but not slavery as punishment for a crime. The constitutional amendment that outlawed slavery included this as an explicit exception case, and in many states this was used as an excuse to immediately re-enslave hundreds of thousands of recently emancipated slaves on the thin accusation of various "crimes". Slavery has since been outlawed altogether in most states including those mentioned above, states in which yours truly canvassed and educated in advance of their respective votes. Slavery remains explicitly legal at the federal level, by copycat legislation in twenty states, is regularly practiced in two, and many states (including my own, unfortunately) use the exception clause to justify paying prisoners pennies on the hour for dangerous involuntary labor, which is not that much different from slavery as a practical matter.
And then there's the
other slough of exception cases. You've mentioned one yourself: if a state refuses to act in any way on undocumented labor, they aren't enforcing anti-slavery laws on behalf of immigrants, either. Many states, actually most, refuse to prosecute "unpaid internships", government employees who have been forced to "volunteer" unpaid overtime, "family members" imported from overseas as labor, and many other tricks employers use to define certain kinds of unpaid labor as something other than slavery. Arguing, in short, that if you don't call it slavery, it shouldn't count as slavery.