Sorry, thumbs down from me. This is a thin cloak, a lot like a white sheet, in fact. Myself, I always declare "two or more races" because I consider "race" to be a social construct only with absolutely no biological foundation. The sociological equivalent of "race" is "culture" and culture, however inherited and bequeathed can be enjoyed by anyone who passes certain rites of initiation, sometimes quite minimal: the global extension of American music forms and clothing styles are just two easy examples.

This Department of the Interior webpage cites six cases over 20 years in which appeals courts ruled that discrimination against so-called "White" people is also racial discrimination.
http://www.doi.gov/pmb/eeo/cases/reverse...

But do not accept the government's word for it. LexisNexis sells a professional assessment, "Larson on Emolyment Discrimination." You can read the informative blurb here:
https://litigation-essentials.lexisnexis... versus University of Texas can be read on the SCOTUS website here:
http://www.supremecourt.gov/opinions/12p...

Basically, Pat Buchanan is just being rhetorical at best. As a "right wing populist" many of his traditionalist political opinions are at direct odds with reality and reason.
Just for instance:
http://www.freerepublic.com/focus/fr/642...
and
http://mediamatters.org/blog/2011/10/21/...
See also a more balanced view of him:
"Buchanan is the last of a dying breed of old-school right-wingers. Yet current American political culture owes an astonishing amount to this Irish Catholic son of D.C.’s Georgetown neighborhood, even as he fades into disgraced bestsellerdom. Notions such as the “silent majority,” liberal media bias, and the modern culture war all sprang, more or less fully formed, from the head of this former Nixon and Reagan aide, as did a Republican critique of “vulture capitalism.”

In fact, pretty much everything that constitutes modern-day Fox News can be traced to Buchanan, although Fox’s own fighting Irishman, Bill O’Reilly, is both less intellectual and less independent-minded than the prototype."
here:
http://reason.com/archives/2012/05/17/ho...