Trump is a very polarizing angry man so likely assassins might (because of this) keep lining up to assassinate him

This would be especially true of Iran in regard to assassinating Trump. In fact this last man the 58 year old could theoretically have been hired to assassinate Trump. Iran wouldn't necessarily have to succeed at this either in order to so rattle Trump that he would be unfit to run. After all, look how crazy and out of it he is already? What is this second attempt on his life going to do to him beyond before?