Trump being ahead shouldnt be taking on all challengers like this. No need to fight everyone else at once. No need to give the opponent the publicity undeserved. At this point he should be mostly sticking to political ideas and trying to limit getting into the personal. Criticize on ideas, not the loyal or not to Bush junk.
Beat Fiorina on like-ability.
Like-able is part of why Carson was doing well.
Rand Paul might be able to tap into like-ability if he tried harder to.
People are going to have to like and be comfortable with who they vote for.
If we wanted vindictive we could vote for Hillary.