Rare broken clock moment for Romney. Most of these candidates have zero chance, but besides the usual business opportunities opened by running for president, they probably all figure they have a shot at the convention if Trump is in jail and there’s no clear alternative candidate - not an unreasonable assumption.
“they probably all figure they have a shot at the convention if Trump is in jail”
That’s only a possibility if Trump doesn’t sew up the nomination before the convention, which, by all appearances, he will probably do quite easily.