I watched a few minutes of it. It was humorous, though Trump supporters will not think so. But I think it is a harbinger of the type of strategy that you will see much more of moving forward - ridiculing Trump rather than attacking him. You have seen Cruz already doing so, first with the Trumpertantrum remark, and now with the new ad is SC. And I think it will be a much more effective tool than trying to attack Trump on specific issues - Trump has been on so many sides of every issue that no matter what you say about his position, he can bring up something else he has said to contradict that. But ridicule, while it will not sway the true believers, can have a powerful impact on the undecided and the casual supporters.
Hey, they did it to Palin and it continues. Remember Carvey being George Bush. Bill, Hill, Obama, not so much. That is why I seriously wonder if any conservative can govern again.