The libertarian Cato Policy Institute has produced a new study "Backfire at the Border: Why Enforcement without Legalization Cannot Stop Illegal Immigration" authored by Prof. Douglas S. Massey of Princeton. The executive summary is here, and you can download the full PDF at that link. A news report is here, which includes the following:

...Massey recommends that Congress build on President Bush's immigration initiative to enact a temporary visa program that would allow workers from Canada, Mexico, and other countries to work in the United States without restriction for a certain limited time. Undocumented workers already in the United States who do not have a criminal record would be given temporary legal status.

In addition, he urges the U.S. government to accept the reality of a continent-wide integrated economy... [Massey writes:] "The time is thus ripe for the United States to abandon its illusions and to accept the reality, indeed the necessity, of North American integration."

The executive summary says, a "border policy that relies solely on enforcement is bound to fail." That is quite misleading. Our efforts at border enforcement are not anywhere near as effective as they could be, and interior enforcement is practically non-existent. Given those facts, his argument is a bit of a strawman.

In an earlier article ("Closed-Door Policy") he wrote:

Why has the United States chosen to militarize a peaceful border with its closest trading partner, a democratic country that poses no conceivable threat to U.S. security?

Obviously, that's either extraordinarily naive or extraordinarily disingenuous. Allowing millions of people to resettle lands that they refer to as their "Lost Territories" does indeed pose a considerable threat to our security.

Last month, Massey testified at an immigration "reform" hearing called by Sen. John Cornyn (R-TX). Others who testified included Deputy Secretary Department of Labor Steven J. Law, Tom Donahue of the U.S. Chamber of Commerce, and Dan Griswold of the CATO Institute. Hardly a balanced panel, as described here. Note that Griswold was involved in or the inspiration for Bush's guest worker plan.

For more on the plans to integrate North America, see "A North American Community Approach to Security" (Senate testimony from a CFR-linked American University professor) and the Security and Prosperity Partnership of North America. For more on the Cato Institute and their funding, see this.