The President of the U.S. Should be allowed to kiss anyone he wants. He should have gone for the Nurses without Boundaries, or whatever they are called.
It didn't sound right so I checked when he visited Emory and when the Ebola patients were there.
But to answer the choice you posited ... I choose liar because he's no idiot.
But if you had suggested he's either a liar or a driven Leftist ideologue, that would have been a double hit despite the obvious overlap.