Since Hillary invited him, his conduct reflects on her judgment.
Should he become a distraction, maybe security will remove him. Wouldn’t reflect too well on Her Awesomeness if that happened.
As for your CPR/First Aid suggestion. Seriously? This would be one instance where you definitely want to let the professionals do the job. They have the necessary equipment to avoid the need to actually touch...her. (That is her preferred pronoun, isn’t it?)