Washington DC - The GOP's last-ditch effort to repeal "Obamacare" would redistribute hundreds of billions of dollars in federal financing for insurance coverage, creating winners and losers among individual Americans and states in ways not yet fully clear.
Independent analysts say the latest Senate Republican bill is likely to leave more people uninsured than the Affordable Care Act, and allow states to make changes that raise costs for people with health problems or pre-existing medical conditions.
After closed-door meetings Tuesday, supporters seemed confident but acknowledged they're not sure if the bill can pass.
There's only a narrow window for the Senate to act under special budget rules that expire at the end of the month.
The Congressional Budget Office has said it doesn't have time to complete a full analysis of the impact on coverage before the deadline. The biggest changes would start in 2020 - the next presidential election year.
That's a political risk for Republicans, since health care changes often involve unforeseen problems.
A key feature of the legislation from Sens. Lindsey Graham of South Carolina and Bill Cassidy of Louisiana would put the ACA's financing for subsidized private health insurance and Medicaid expansion into a giant pot and redistribute it among states according to new formulas.