He keeps threatening it on his show. Thats not making anything up.
Where’s Mark’s statement that if Boehner wins he will leave the GOP?
As for threatening to do it, what I heard him say, is that he is one inch away from leaving it.
I did not hear him say when, or he would if Johnny boy wins.
That appears to be a contrivance on your part but I’m willing to read proof of a statement by him that lines him up with your claim.