Children can consent, what makes you think they can’t, because the legislature says so? LOL So if the legislature made the age of consent 12 like it is in the Nederlands you think the USSC is going to intervene?
Any politician that supports dropping the age of consent to 12 is going to lose their job. That goes against the #1 priority of any politician, and that is keeping their job/power.
If the lowered age of consent were to make its way through a legislature, next election (if there wasn't a recall) would see plenty of new faces who would be more than happy to overturn that.