Ben Carson should join Trump, skip debate. He can say it’s because he just naps through these debates anyway, doesn’t get serious attention.
It would put Carson back in headlines.
Some of the “why are you still running?” guys, especially Carson, could probably get some traction from skipping an evening of getting questioned by a communist and beat down by Cruz. Cruz has to go to make a point that Trump is a jerk. Rubio will probably be there.