Ever hear of the United States Bill of Rights? Ever hear of the Tenth Amendment to the United States Constitution? Some good reading in there for you...
Dude - do you understand what the term statutory means in statutory rape? it's when a man (possibly a boy of 15 or 16) has consensual sex with an underage girl (could also be 15 or 16, but the boy gets charged). Also understand that because some judges deemed something can be a federal crime doesn't always make it a constitutional decision. States have the right to determine things but the Feds have usurped a lot of the power given the States - look what they did with"hate crimes". No State is going to get away with allowing human trafficking and other sorts of atrocities - its own citizens would rise up - the 'protections" the Feds provide would be provided anyway in the areas that really matter because the States would handle it.
The dude has a pet peeve where he doesn't think the constitution really matters - he's obviously a "Obama Constitutional Scholar" where he thinks it means what he would like it to mean.