It couldn't get harsher than what they've already said before he became the republican nominee.

From Romney: https://www.youtube.com/watch?v=PpZGR_eTbAI

From Cruz: https://www.youtube.com/watch?v=19AGfTDxNHA

I really don't think this was 2 stuffed shirts toeing the party line either. I think they truly meant what they said, and they still feel that way.