You use the word transgender but you refuse to grasp that anyone who happens to "identify" with a different sex that day can go hang out in the bathroom or locker room of their choice. Good thing they're aren't many sexually perverted people out there in our society. Otherwise this could be a cause of concern for normal people.
It's good to know that you don't think cultural issues aren't important to our society and that a guy who doesn't have the sand to stand up to a small percentage of perverted and mentally ill people DOES have the courage to stand up to the hundreds of millions who will curse him for trying to build a wall. I'm sure this same guy will have no problem finding the courage to negotiate great trade deals with communist totalitarians while stopping Muslim mass murderers. Those folks are pussycats compared to the gay mafia.
Tell me, how do you prevent it?
Laws don’t prevent crime, they define them
You need a police force to enforce it
We already have pervert laws in every state
So the laws already exist
Do we create a Federal Bureau of Potties? Do they have a police force that goes from bathroom to bathroom to make sure the right gender is using the right potty?
Seriously, what is the next step?