I plead ignorance! What the heck IS Pat B? I can't figure him out.
The usual moniker is "paleocon," which basically means pretty much the opposite of (and the term being created in reaction to) "neocon".
Neoconservatives were (historically, although the term has gradually been losing the sense of this historical reference) liberals who moved to the conservative side of the fence driven principally in horror of Jimmah Cahtah's feckless and inept foreign policy, and the general softness of the left on issues of national security.
Neocons, then, generally favor forward leaning foreign and national security policies. Paleocons tend, by contrast, to be isolationist. Now there IS a similarity here to many libertarians who also tend to be isolationist wrt the projection of American military and political energy. But the difference is on economics. Paleocons (and Pat Buchanan specifically) are also economic isolationists, i.e. protectionists. Libertarians (although often suspicious of government management of trade and economic relationships and agreements) are definitely opposed to protectionist policies.