Executive order time. He can do that, right?
It'd cause an uproar amongst the pro-death crowd, but I'm sure he could.
The Congress can overturn a Presidential Executive Order if it conflicts with a law that they have passed. ALSO (and most unfortunately) the Supreme Court can also strike down Executive Orders if they interfere with rulings that they have made because it is an attempt to "make law"...something the Supreme Court has been doing for decades. This is not going to be a likely occurrence.