Yes, I wish he would just do it.
I don’t believe he will sue.
All talk.
He stays in front of the cameras this way, for free.
If he sues and wins, his opponents will attack him, saying he cannot argue on issues, he just finds ways to knock out his rivals, like Obama did when he ran in the state of Illinois.
If he looses, it shows he is not a legal expert, and that favors Cruz, and puts doubts in the minds of people who would vote for Trump, especially with the passing of Scalia.
No, he will just keep it out there, saying it but doing nothing, because that benefits him the most.
Keep the seed of doubt in the voters minds, without proving/disproving a thing.