REUTERS/Joshua RobertsThe Congressional Budget Office on Wednesday released its latest projections for the GOP healthcare bill, and one new detail showed the newest version of the bill could lead to a disaster that Republicans feared under Obamacare. In every previous CBO score for both Obamacare and the American Health Care Act, the CBO had said the individual insurance market would remain stable. That means the marketplaces where people who do not receive coverage through their job or a government program like Medicaid would continue to be able to purchase insurance at an affordable price. But the final version of the GOP's American Health Care Act, the CBO said, would undermine that stability. One of the additions to the AHCA since the CBO's last judgment on the legislation came with the MacArthur amendment, which would allow states to waive two of Obamacare's biggest protections: so-called community rating and essential health benefits. Essential health benefits mandate that insurers cover a baseline of healthcare needs, like maternity care and mental-health services.