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.

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.

Republican Susan Collins of Maine late Monday said she would vote against a key procedural step, joining Rand Paul of Kentucky and Dean Heller of Nevada.

Senate leaders released a slightly revised version of their health care bill Monday as Mitch McConnell tries to win over enough holdouts to pass the measure, with at least six Republicans signaling opposition.

Trump earlier attacked Democrats for their 'slam' on the health-care proposal. Yet the measure will live or die in the Senate on Republican support.

So far, Democrats have had a tough time getting their message out as the Russia investigations are dominating news coverage and reporters are talking primarily to Republicans in a health debate that relies only on their votes.