I guess medical attention was out of the question?
You would figure when a president got shot in a situation like that a crack medical squad would be descending down on him like a SWAT team or something to beat life back into him. The president was shot and not only was there no med team anywhere in sight (not even an ambulance on stand by) not a single character even mentioned the idea maybe a doctor could be of help.
"The president has been shot? Well kick him in the hole, he's dead."