Congressional budget experts say the new Senate health care bill would make a government health plan widely available.

The Congressional Budget Office said Thursday that about two-thirds of the U.S. population would have a public plan available in their state, even though the Democrats' ten-year, $848-billion bill would allow states to opt out.

Wide availability doesn't mean the government plan would dominate the market, however. The budget umpires are estimating only three million to four million people would sign up, partly because private insurance plans would be able to offer lower premiums. While most Americans would be able to observe the new experiment with government coverage, few would actually participate.

©2009 The Associated Press. All rights reserved.