The GOP's health bill failed as defections by Mike Lee of Utah and Jerry Moran of Kansas, in addition to previous opposition by Senators Rand Paul of Kentucky and Susan Collins of Maine, sank the measure. What's next? Repeal.

Besides the delay in the CBO's release of financial estimates of the revised health bill's impact, a senator's medical emergency adds a complication -- will it buy McConnell time to persuade the holdouts?

The change comes on top of $112 billion provided for the same purpose in an earlier measure by Senate Majority Leader Mitch McConnell.

Republican leaders are now planning to retain the ACA's 3.8 percent tax on net investment income for people who earn more than $200,000 and couples with incomes over $250,000, as well as a 0.9 percent Medicare surtax on the same incomes.

President Donald Trump has called on lawmakers to complete health care legislation before going on recess.

For the bill to pass, and Republicans to live up to their promise to eliminate President Barack Obamas signature domestic accomplishment, they can lose no more than two GOP votes from their 52-48 majority amid unanimous Democratic opposition.

Republican leaders have said they need to move on to other issues, including a tax-code overhaul and next years spending bills, if they cant agree on a health bill before a month-long August break.

Donald Trump said if Republican senators cant strike a deal on their health bill, they should immediately repeal the Affordable Care Act and replace it later, a reversal of his earlier position.