He's already said he'd pardon a convicted Trump because tossing a criminal ex-President into prison isn't good for the country.

If Trump had a massive heart attack tomorrow, for all of Ron's warts, I think he would have the Trump base sewn up. Strategically, running on a Trumpian platform isn't working for Ron but I don't see how he can pivot or "reboot" to something better.
Besides, it's not like running a more aggressive and honest campaign like Will Hurd or Gov. Christie can upset the apple cart either. GOP low information voters don't want honesty or ethics, they want more Trump attacks.