During that vote, McConnell can only afford to lose two GOP votes and still see the bill pass, since all of the Democratic senators have said they will vote no on the bill. Last week, Mr. Trump tweeted that he is "very supportive" of the Senate bill.
The Senate legislation resembles a bill the House approved in May that the budget office said would result in 23 million additional Americans without coverage by 2026. "They got this herd mentality where we gotta pass this bill or else", he said.
"We've got a lot of discussions going on and I'm still optimistic we're going to get there", he added.
The majority leader confirmed that the Republican caucus would head to the White House later Tuesday afternoon to meet with President Donald Trump. But for the country, we have to have healthcare. And at least three Republican senators said they would not support a motion to proceed with the bill without changes.
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For its part, Riyadh went all-in behind the Egyptian military, which ousted Morsi just over a year after he was elected. Expectations for Qatar to distance itself from Iran are less realistic, given their shared natural gas resources.
"The president has been very involved", McConnell told reporters.
The bill, which would roll back much of President Barack Obama's healthcare law, has been one of the party's top priorities for years, and the delay is a major embarrassment to Mr Trump and Mr McConnell.
And now, disgruntled centrist and conservative GOP senators are forcing Senate Majority Leader Mitch McConnell to scramble to rescue the measure before debate even begins. He's been aiming at winning Senate passage this week, before a weeklong July 4 recess that leaders worry opponents will use to weaken support for the legislation. It would also reshape federal health care subsidies for people buying individual policies and eliminate taxes on wealthier people and medical companies that Obama's law used to expand coverage.
Unlike the first House bill, the Senate did not wait for the floor to debate before pulling the plug. But moderates like Heller and Susan Collins of ME criticize the bill as overly punitive in throwing people off insurance roles and limiting benefits paid by Medicaid, which has become the nation's biggest health care program, covering nursing home care for seniors as well as care for many poor Americans. All four said last week they'd oppose the bill without changes, as did Heller.
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It would cut Medicaid, which provides health insurance to more than 70 million poor and disabled people, by 772 billion dollars through until 2026 by capping its overall spending and phasing out Mr Obama's expansion of the programme. Moderate Republicans anxious millions of people would lose their insurance.
In another troublesome finding for the legislation, the budget office warned that in some rural areas, either no insurer would be willing participate in the individual market or the policies offered would be prohibitively expensive.
FILE - In this Tuesday, June 20, 2017 file photo, Sen.
Passing the measure would be a win for Trump as he seeks to shift attention after weeks of questions over Russia's role in last year's US presidential election.
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