They already are - Ashcroft in Oregon, for one.
Absolutely no legal justification for federal interference in this matter, a state right from the beginning.
His only reason for trying to subvert the will of the voters is his religious beliefs. And he's using the power of the Federal government in ways he promised not to at his confirmation.
"The attorney general's unilateral attempt to regulate general medical practices historically entrusted to state lawmakers interferes with the democratic debate about physician-assisted suicide and far exceeds the scope of his authority under federal law," the court said in a 2-1 opinion."
Arf