now it makes sense that he couldnt take out the shooter since he was hanging on with both hands.After that however you gotta wonder what happened,how and why.
After the brief encounter with the local cop, some online are speculating that the shooter sped up his actions since he was discovered by someone perhaps outside of the sphere of control of the deep state. Local cop less likely to be on board with an assassination attempt.
It would only be a matter of minutes before the locals would be acting, or someone took action to neutralize the shooter. (which should have been done a LOT earlier).
That might (or might not) have caused him to act more hastily and thus not have as true of aim as he might have. Still a game of inches, and an inch or 2 to his right would have killed not only Trump but the United States as well.