From Mark Krikorian in Newsday:

There has been much well-deserved criticism of President George W. Bush's proposed amnesty and guestworker plan. But its possible effect on America's sovereignty has seldom been mentioned, even though that may be the most harmful in the long term.

Although the president's proposal is not specific to Mexico, it would benefit that nation the most. Some 5 million of the estimated 8 million illegal aliens here are Mexican, and Mexico would likely be one of the main sources of the new guestworkers and increased permanent immigration also called for in the Bush plan.

This is important because, in the 1990s, Mexico embarked on a campaign of extending its political authority into the United States - not just over Mexican immigrants, but also naturalized and native-born Americans of Mexican ancestry. There are 10 million Mexican-born people in this country (including 5 million illegals) plus more than 10 million additional Americans of Mexican descent.

Now, this is not the fantasy of reconquista - retaking the Southwest, lost in the 1846-'48 Mexican War. Instead, it is an attempt to set up a special status for people of Mexican origin, like the status Europeans enjoyed in China in the 19th century.

There's nothing secret about this effort. President Vicente Fox once referred to himself as president of all 118 million Mexicans - the 100 million in Mexico and the (then-)18 million in the United States, the majority of whom are U.S. citizens. And this is a long-term proposition for them: In June 2001, Juan Hernandez, former head of Fox's cabinet-level office for relations with Mexicans abroad, said on ABC's "Nightline," "I want the third generation, the seventh generation, I want them all to think, 'Mexico first.'"

There are several elements to the Mexican government's campaign:

Dual citizenship... (also see this)

Consular network... (see "Mexico to begin "propagating militant activities" in the U.S.")

IDs for illegals...

Mexico's efforts to extend its authority over a large part of the American population represents the most serious threat to our sovereignty since the Civil War. The president's amnesty/guestworker proposal, which would lead to vastly increased legal (and, inevitably, illegal) immigration from Mexico, would hugely accelerate this trend.