To compare Pat Buchanan to Pinochet and Franco is an insult to the latter two who, so far as I know, were not anti-Semitic (Franco, though not perfect, saved many Jewish lives during WWII). As a matter of fact, Mussolini wasn't anti-Semitic until he came under Hitler's influence (when he became a total stooge, closing Italy off for Jewish refugees and leaving them to the tender mercies of the Nazis).
But there is something very interesting in your suggestion. American "palaeocons" differ from their counterparts in other parts of the world in one major way: American palaeos favor extreme decentralization and "states' rights" whereas their counterparts everywhere else are extreme centralists and statists (witness how most American palaeos sound like a combination of John C. Calhoun and Ayn Rand rather than any "nationalist" from any other nation, even going so far as to accuse President Bush of "fascism"). So if one of their own were to take over the US would he immediately give it all away to fifty sovereign states, or would he backpeddly and create a centralized fascist state???
I wouldn't vote for either, but then elections might not be on their agenda.