Gisele Grayson

Republicans headed into an all-night session in an uncomfortable position where the only legislation they can potentially pass is a bill most senators oppose.

The Senate has voted to send a bill repealing and replacing the Affordable Care Act to the floor for debate. But with multiple bills in play, it could be months before legislation actually emerges.

Tax breaks for the wealthy would be trimmed, and people would get the option to buy bare-bones plans. But big cuts in Medicaid and changes to coverage for pre-existing conditions remain.

The Congressional Budget Office estimates that 22 million people would lose coverage with the Senate bill. That includes 15 million people on Medicaid, and others who could no longer afford insurance.

Senate Republicans are calling their health care bill the Better Care Reconciliation Act. It shares many provisions with the House's American Health Care Act, but goes further in cutting Medicaid.