When I said that Graham and Paul have serious presidential ambitions, I didn't mean they had a serious chance at winning the nomination, only that they both want the nomination badly, no matter how unrealistic that may be, and both are likely to run again for the GOP nomination at some point, no matter how unrealistic their chances are. So do Cruz and Hawley and Cotton (and Nikki Haley, most likely.) By voting to more or less let Trump off the hook they're clearing the way for him to run again in '24 and thus weakening their own chances, no matter how unrealistic they were to begin with.