Lindsey Graham would take us into war with Iran. I heard his response to the Iran deal and it was essentially saying bomb 'em. That's crazy in my book.
Christie in all likelihood is blatantly corrupt. Not that they aren't all unduly influenced including Clinton, but Christie's tactics cross the line. I also take issue with the claim he has accomplishments.
Bush really is blind to or at a minimum can't admit how badly his brother's administration was. GW had baggage that resulting in him blindly finishing Daddy's war. What baggage does Jeb have? It concerns me. If Jeb had to make a decision that said GW screwed up, could he do it? I doubt it.
I don't know Kasich well enough to say one way or the other.