We heard many news reports of many pardons Obama made. But is it possible Obama could have secretly made other pardons as well?

For example, assume Obama pardoned, say, Hillary Clinton, for example: Obama gave Hillary an official, legally binding document with a pardon on it; only Obama did this secretly and neither Obama nor Hillary told anyone about it. Now let's say years later, Hillary gets prosecuted for a "crime against the United States?"

Could Hillary pull out her pardon and play it like a trump card?

Or, more to the point, do we have any way of knowing for certain that Obama did not make any secret pre-emptive pardons?

marked as duplicate by Panda, Community Jan 24 '17 at 7:34

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  • While the "secret pardon" part is a duplicate, you could perhaps edit your question to just be about the possibility of a preemptive pardon, which was not answered previously (or at least not in the (now linked) previous answer). – owjburnham Mar 9 '17 at 18:01
  • "like a trump card" could also be spelled "like a Trump card" in this case. – Evargalo Apr 18 '18 at 14:55