In order for the bill to receive a green light, 50 out of 52 Republican senators would have to vote "yes", which might not be possible when it comes to the current version of the bill, the Washington Post reported.
Senate Republicans, who have a majority in the chamber, are looking to bring the legislation to the floor for a vote next week.
"They're four good guys and they're friends of mine", the president said. Yesterday 43 protesters were arrested at the office of Senate Majority Leader Mitch McConnell. But its fate remains uncertain. Democrats are united in opposition. And at least a half-dozen Republicans - both conservatives and moderates - have complained about it.
According to Zwillich, the changes to the tax credits would not go into effect until 2020. As the nation's medical schools and teaching hospitals see every day, people without sufficient coverage often delay getting the care they need.
But it keeps the part that everybody likes, which is covering pre-existing conditions.
"[There are] no guarantees that there will be insurance coverage for that", Keating said.
"No one knows the Senate better than Senator McConnell", White House spokesman Sean Spicer said Friday on Fox News Channel's "America's Newsroom".
For the next two years, the Senate would also provide money that insurers use to help lower out-of-pocket costs for millions of lower income people. "He may or may not succeed, he probably doesn't have the votes right now, but even if he doesn't have the votes right now, he can make deals to get there". "We can do it by smoothing out the rates".
Four Republican senators said they are unable for vote for the Senate's healthcare bill as written, jeopardizing its passage.
In a separate statement, Cruz added that in its current format, the bill "does not do almost enough to lower premiums".
Also aiding McConnell is the fact that Republicans have campaigned on repealing and replacing Obamacare for more than seven years.
As TIME reported on Thursday, numerous senators involved in formulating the bill received high-dollar donations from health insurance companies, pharmaceutical companies, or other related organizations.
The American Academy of Pediatrics says the bill would hurt children by scaling back Medicaid.
"We made a lot of progress".
The Senate measure maintains much of the structure of a House bill passed in May but differs in several key ways. The deep cuts to Medicaid likely mean about 20 million Americans will lose their health insurance, including 4.5 million Californians.
Hoping to influence the outcome, if not derail the GOP effort to unwind the Affordable Care Act (ACA), healthcare groups, doctors and nurses, activists on the left and even some clergy will launch a massive lobbying effort with personal stories of people whose lives would change if they lost health coverage.
Obama has encouraged members of Congress to be strong when approaching healthcare, saying it required "some courage to champion the vulnerable and the sick and the infirm".