[Dave W]

What do you want him to do? He is not a dictator and has no control over a state legislature. If they pass laws, the state will be sued and it will go to the courts.

Then the administration can file a friend of the court brief on behalf of the plaintiffs and that is all he can do.

[Poison Pill]

What do you want him to do?

Enforce the Second Amendment to the Constitution

He is not a dictator

Correct. He's the President of the United States

and has no control over a state legislature

In this case, yes he does. The Due Process clause of the 14th Amendment makes the Bill of Rights applicable to the States. That means that if state legislatures violate 2A he has a duty to stop them.