First off, the difference between the states makes no difference in the US. It's federally illegal to "induce, entice, or coerce" the creation of the child porn.
If the requester is in the US, it's still federally illegal to make the request of a US minor to do so (though potentially difficult to prosecute).
If the requester is in the US and the child is abroad, it's illegal to make the request and pretty straightforward to prosecute in the US. I have a close relative (alas), who is facing three counts of child porn for accessing an off-shore website that the cops were watching.

