Rand Paul refused to participate in the loser tier debate last time, and look where he is now. He played hardball and is back on the main stage.
The only bigger stage the Trump could hope for is one by himself. Maybe Trump could do one by himself on the Cartoon Network where he could debate himself on all his own abandoned liberal positions.
All Rand Paul does is take up space, much like a few others. Irrelevant.
I groaned when they announced that Kasich would be on the stage again.