One reason Rick Perry has a shot that you left out is that since Texas is basically the richest state in the USA he has the ability to raise more money than all the other Republican candidates due to his Texas business connections.
I have to disagree with the wornderful Jews in Judea and Samaria in asking Chaim to devote more effort to defeating Obama. JTF's ability to influence the American elections is miniscule while its ability to support and encourage the heroes in Judea and Samaria is substantial. Nobody who likes and respects JTF is voting for Obama anyway. If anything Jews on the fence may be pushed over to Obama if we aggressively attack him in the style that we tend to do.