Trump, being Trump, would pulverized Mitt and Mitt knows it...
If Mitt couldn't stand up to obuma, what gives anyone any idea he could stand up to Trump?
If Mitt has any common sense, he will stay in the back ground...unless he wants things to come out that he knows that will and won't look good...Mitt isn't any better being a Mormon than Harry Reid or Orin Hatch...
All he has to do is hurt the non GOP candidate and tank as he did with Obama. Slaughtered him day 1 then balled up on the mat.