If there were plants, I think they were there for the same old purpose of splitting the conservative vote to help the GOPe anointed candidate: JEB.
All those plans were probably made before Trump came along, and now they're scrambling to find some new also rans to sic on Trump and try to damage him.
I agree with you. I think Trump screwed up the donor class JEB plan and now they are afraid they will lose control of the process and not have their yes man as the nominee.