Apparently Pat Buchanan and many other traditional Republicans are now left wingers according to Nacho....
Actually, traditional Republicans would be called 'paleoconservatives.' Wikipedia says:
"Paleoconservatives are most easily distinguishable from other conservatives in their emphatic opposition to illegal immigration, their strong opposition to affirmative action, and their general disapproval of ... intervention overseas. They are not closely tied to the business community nor to the Religious Right. Neoconservatives, by contrast, are more consensus-oriented, pragmatic and lend their support to a more activist internationalist foreign policy."
And, these two versions of conservatism are not limited to the US, in case one may ask. In general, Europe tends to be more paleoconservative, if conservative at all (though Blair, for example, is probably more of a neoconservative, though he is technically a centrist).