if a state with a small, homogeneous population can't do ObamaCare, why would we extend it to the nation?

From the editorialists of the WSJ...

Want a preview of ObamaCare in action? Sneak a look at what has happened in Maine. In 2003, the state to great fanfare enacted its own version of universal health care. Democratic Governor John Baldacci signed the plan into law with a bevy of familiar promises. By 2009, it would cover all of Maine's approximately 128,000 uninsured citizens. System-wide controls on hospital and physician costs would hold down insurance premiums. There would be no tax increases. The program was going to provide insurance for everyone and save businesses and patients money at the same time.

After five years, fiscal realities as brutal as the waves that crash along Maine's famous coastline have hit the insurance plan. The system that was supposed to save money has cost taxpayers $155 million and is still rising.

Here's how the program was supposed to work. Two government programs would cover the uninsured. First the legislature greatly expanded MaineCare, the state's Medicaid program. Today Maine families with incomes of up to $44,000 a year are eligible; 22% of the population is now in Medicaid, roughly twice the national average.

Then the state created a "public option" known as DirigoChoice. (Dirigo is the state motto, meaning "I Lead.") This plan would compete with private plans such as Blue Cross. To entice lower income Mainers to enroll, it offered taxpayer-subsidized premiums....

The program flew off track fast....Despite the giant expansions in Maine's Medicaid program and the new, subsidized public choice option, the number of uninsured in the state today is only slightly lower that in 2004 when the program began.

Why did this happen? Among the biggest reasons is a severe adverse selection problem: The sickest, most expensive patients crowded into DirigoChoice, unbalancing its insurance pool and raising costs. That made it unattractive for healthier and lower-risk enrollees. And as a result, few low-income Mainers have been able to afford the premiums, even at subsidized rates.

This problem was exacerbated because since the early 1990s Maine has required insurers to adhere to community rating and guaranteed issue, which requires that insurers cover anyone who applies, regardless of their health condition and at a uniform premium. These rules—which are in the Obama plan—have relentlessly driven up insurance costs in Maine, especially for healthy people....