Upon signing Arizona's new statute requiring police officers to demand citizenship papers from anyone they believe is in the country illegally, Republican Gov. Jan Brewer last week claimed the bill is not designed to "tolerate racial discrimination or racial profiling" of Latinos. Responding to critics who say the legislation does just that, she, like many conservatives, insisted, "I don't know what an illegal immigrant looks like" -- the implication being that Republicans are colorblind. It sounds reassuring, but methinks she doth protest too much, and I say that because one of the Republican Party's leading law enforcement voices has already disclosed the true objective of precisely this kind of legislation. That seminal admission came in November 2001, when the emotional aftermath of 9/11 momentarily removed politicians' rhetorical filters.