In the long, loud argument about President Barack Obama's health care overhaul, opponents contend it would point toward a government takeover of the system. Democrats deny that. Now there's evidence that it's already happening, inexorably, whatever the outcome on the stalled health care bill.

For the first time, government programs will account for more than half of U.S. health care spending by 2012, and that share will keep creeping upward, according to federal actuaries.

Federal and state government programs now cover an estimated 42 percent of health care costs. That is likely to reach 52 percent before the end of the decade.