[A day or two ago] Rubio said during a conversation on Kentucky Sports Radio, obtained by BuzzFeed...that Trump was “a very touchy and insecure guy”
Return fire is fair. We need guys who will stand up for themselves. I have no problem with it.
True, but Trump has shown himself to have a very thin skin, and is unable to let any perceived slight pass by. I think the gameplan right now is to have so many people needling Trump that he is constantly attacking in return, with the intent that the average Republican and average independent just get sick and tired of listening to it and tune him out. Trump's ego is his Achilles heel, and his opponents are going to use it.