Trump's "blood" comment just might knock him out of the race. There's no humorous aspect to that at all. Just horrificly tasteless and disrespectful. Saying something like that shows incredibly poor judgement to say the least.
Well, he is the same guy whose poll numbers went up after he insulted POWs.
Basically he insulted McCain, who is detested by many. I predict that McCain's war-mongering ### is done. McCain campaigned for Lindsay "GrimReaper" Graham and Graham is polling at 0%. That should tell you a lot about McCain's status in the party.
He was most directly going after McCain, but he insulted all POWs in the process, by stating that he prefers people who weren't captured. That goes a bit broader than McCain.
...But I wasn't looking to pick a fight about McCain/POWs/etc. Just pointing that he has said pretty disrespectful and tasteless things about other people/groups in this campaign -- e.g., the McCain/POW comment, the "rapists" comment. Maybe this is his "have you no sense of decency, at last" moment, but I thought he thought crossed that bridge a long time ago.
I'm not sure what he could do/say that would make me think that would knock him out of the race -- maybe burning an American flag or admitting to killing 5 hookers at SMU, but I'm not even sure of that.