The political effects of conservative opposition to immigration reform have been swift as well. Latino support for GOP candidates dropped back to 30 percent in 2006. According to one poll, Latinos under age 30 now prefer a generic Democrat over a Republican for president by 42 points. A harsh, Tancredo-like image of Republicans has solidified in the mainstream Hispanic media. And all of this regression will be even more obvious in the next few months, because more than half of the Hispanic voters in America live in states that are part of the new lineup of early primaries.

I have never seen an issue where the short-term interests of Republican presidential candidates in the primaries were more starkly at odds with the long-term interests of the party itself. At least five swing states that Bush carried in 2004 are rich in Hispanic voters -- Arizona, New Mexico, Nevada, Colorado and Florida. Bush won Nevada by just over 20,000 votes. A substantial shift of Hispanic voters toward the Democrats in these states could make the national political map unwinnable for Republicans.

There is a moral hazard as well. Surfing on a wave of voter resentment is easier than rowing on the calmer waters of inclusion and charity. But the heroes of America are generally heroes of reconciliation, not division.

In politics, some acts are so emblematic and potent that they cannot be undone for decades -- as when Republican presidential candidate Barry Goldwater voted against the Civil Rights Act of 1964. Goldwater was no racist; his constitutional objections were sincere. Members of the Republican Party actually voted for the Civil Rights Act in higher percentages than Democrats. But all of this was overwhelmed by the symbolism of the moment. In his autobiography, Colin Powell says that after the Goldwater vote, he went to his car and affixed a Lyndon Johnson bumper sticker, as did many other African Americans. Now Republicans seem to be repeating history with Hispanic Americans. Some in the party seem pleased. They should be terrified.