I won't argue your point that the risk is there that Cruz is making deals with the devil...
But to say he has less charisma than the three you named....that's laughable. He has more spunk, passion and charisma than all three of those put together.
GWB
Personable (if not articulate) and resolute.
Rubio
Shiny, handsome, articulate when on script.
ÃJeb!
Yeah, you are right. ÃJeb! is a turnip, charismatically speaking. I musta been smoking some of AJ's stash when I included the trans-hispanic ÃJeb!.
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Cruz
He is smarter than all three (or most any GOP POTUStential candidate in a long time) and he has more
naked ambition than either Bush(1). Rubio may rival Cruz in that category (ambition, not smarts). But naked ambition is not pretty to behold. Were he a bit more introspective or socially astute, his ambition could be projected as passion & spunk. But Cruz can not or has not pulled that one off. Instead, even folk who like much of what Cruz says(2) catch the scent of that naked ambition mixed with A/V nerd-level social cluelessness(3). Cruz is too lacking in social graces or smarts to polish that naked ambition into "passion and spunk" for folk not already in his corner. Maybe he will develop some social smarts.
(1) In reality, I think both Bushes are as ambitious as can be, they just have the social skills to smooth it out.
(2) I include my own self in that group. Especially when he was beating Dianne Feinstein about the head in the Senate regarding a constitutional point. Good stuff, that.
(3) "Why's she angry? She asked if she looked fat in that pricey outfit she's been pining over for a month and I told her her ass looked much larger than in her usual clothing. What gives?"