I honestly don't understand that point at all. Are you saying that McConnell is not confirming him because confirming him would help Trump? I'd love to hear the reasoning behind that one, but if what you say is correct, and Trump doesn't get the nomination, we should expect McConnell to confirm the nominee. Right?
What if Trump does win the nomination? What does your theory say McConnell would do then?
McConnell caving on the Supreme Court nominee would give Trump serious momentum. It would play into Trump’s campaign perfectly. McConnell isn’t going help by giving Trump any advantage.