To follow up on Paul Nachman's blog below, we've known for years that a great many of the "uninsured Americans" that socialized medicine is hoping to cover are, of course, not American at all. CIS is having a panel on this, (Wednesday, August 19, if you're physically in Washington, DC, and want to attend) and they have some figures:

One out of three people in the U.S. without health insurance is an immigrant (legal or illegal) or the U.S.-born child (under 18) of an immigrant. Immigrants and their children also account for one-fourth of those on Medicaid. While there has been some discussion of whether illegal immigrants should be covered by proposed government insurance plans, the enormous impact of immigration, both legal and illegal, on the health care system has generally not been acknowledged in the current debate.