Cruz and Carson are statistically close to Trump but... I'm not sure either one would be much better.
The stupider the stuff he says, the more ground Trump seems to gain.
I used to think he would put his hoof in his mouth and be done.
Unfortunately, the deeper he steps in it, the better he seems to do.
I'm absolutely sure that somewhere in DC, there is a group of political consultants getting stinking drunk and wondering WTF happened.