I don't think any US President will ever officially endorse a truly Kahanist position. Jews have to solve the problem on their own without looking for foreign support because it is very likely that they will never receive any on that matter. World opinion is too blind and world leaders are too hypocritical.
What Israel might try to secure, at least, are "assurances" that America, while protesting with the rest of the world, will not intervene against Israel.
But, as long as the Israeli government is not ready to embark on a Kahanist platform and to encourage mass immigration of Arabs out of Israel, such an initiative seems pointless to me anyway. Not to mention that I'm afraid that "we" (Kahanists) don't have much to offer to US conservative candidates. How could we provide them with media attention when we desperately lack it to disseminate our message ?? Why would they take the political risk to tell the truth and nothing but the truth about "Palestine" and the "Palestinians" ? Who is courageous and righteous enough to do that among them ? In my opinion, the most righteous of the current contenders is probably Michelle Bachmann - she is the one whose moral judgment and integrity I would trust the most. But I don't know if she is ready to support Kahanist views yet. Even if she is, she won't as long as the pathetic Israeli leaders don't.