They clearly don't want him. Of course, it would be suicide if he has enough delegates and they refuse to give it to him, but would they allow him to even advance to the primaries?
I don't know how they would prevent him from doing so, unless you're suggesting that they take a page from the Clinton playbook and give him the Vince Foster treatment?
I seriously would not rule this out.
Well the GOP has a candidate whose father is former director of the CIA. If he could secretly fly to Paris to delay the release of the Iranian hostages long enough for Reagan to win the election, undoing Donald Trump ought not to tax him too much.