Not so many years ago, immigration - especially illegal immigration - was one of those topics best discussed in lowered tones and in small settings. Time passed and suddenly there are signs all over the place that immigration has become one of the nation's most fashionable topics. For example, last Sunday's Denver Post contained an article detailing Colorado Congressman Tom Tancredo's plans to keep the issue front and center even if it means he will have to mount a quixotic campaign for president. Tancredo's determination to go on the offensive is best understood as part of a larger political...