I really have trouble seeing this happening. Beyond the whole "disorder" issue, one of the big reasons that it's a crime is because children are considered to be incapable of informed consent.
To legalize this vile behavior they'd have to pretty much revoke the entire concept of childhood and the concept that kids under a certain age do not have the necessary judgement and experience to make major life decisions. Kids declared able to give "informed consent" to sexual behavior with adults would also have to be allowed to vote, marry, serve in the military, etc.
There will always be a small subset of nutjob shrinks that try to argue this, but hopefully common sense will prevail.
I can see a big push by the pedophiles to get age of consent lowered nationwide. Currently, Canada has it at 14, and I can see it being pushed for in the US.
The main targets of gay pedophiles are young teens, rather than pre-adolescants. (The push for lowering consent still further will come later)
Consider the madness that has the US considering that a young person does not have the maturity to drink alcohol responsibly until 21, yet is mature enough to cast a vote for President at 18, and is mature enough to have sex which involves risk of pregnancy or a fatal disease at an even younger age