White House press secretary Sean Spicer voiced confidence on Friday that President Trump would round up enough support in the Senate to pass a Republican measure to overhaul the country's healthcare system.

"When President Trump wants to get something done, it's going to get done, and I think no one knows the Senate better than Sen. McConnell — the leader over there," Spicer said on Fox News' "America’s Newsroom with co-anchor Bill Hemmer," referring to Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellDemocratic senator to party: 'A little message discipline wouldn't kill us' House to vote on resolution affirming peaceful transition of power Republican lawyers brush off Trump's election comments MORE (R-Ky.).

"So with that combination, I think we're going to get this thing done, put it in conference and hopefully by the August recess really have ObamaCare repealed and replaced and be on the place to affordable and accessible healthcare, as the president has promised."

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Republican leaders in the Senate unveiled their version of a healthcare reform bill on Thursday. But some Republicans voiced concern over the legislation, and it is unclear if Senate leaders will be able to rally enough support to pass it.

House Republicans voted last month to pass the American Health Care Act, their plan to repeal and replace large parts of ObamaCare.

Trump told Republican senators earlier this month that the House bill was "mean" and that the Senate bill should be more generous.

Shortly after the Senate bill was unveiled, Trump said it needed "a little negotiation." He tweeted Thursday night that he was "very supportive" of the measure.

Senate Republican leaders are hoping to vote on the measure next week. The GOP holds 52 seats in the chamber and will need to rally at least 50 votes to pass the bill. Senate Democrats are expected to vote unanimously against it.

Updated at 5:38 p.m.