If he uses an executive order or sends in the troops without any authority, than yes, he's a dictator. And, again, what offense against the United States has she committed that would give the president the authority to pardon her? And once again, I understand the issue here - I believe that withholding food and water from a patient is unethical and barbaric, but I don't want my president, whoever he is and whatever party he belongs to, issuing orders for which he has no constitutional authority.
Let me ask you this. Would you be more offended that he took Terri Schiavo into custody (no matter what justification he might concoct) or that he signed campaign finance reform?
When the states violate the life, or liberty of an innocent, it becomes the duty of the United States to respond.