Republicans delayed a rapid-fire series of votes on the measure until Monday morning as they grasped for the support to pass President Trump's signature legislation.
The agreement with Nayib Bukele, the president of El Salvador, is undermining a long-running federal investigation into the gang, according to people familiar with the inquiry.
Top gang leaders being sent back to El Salvador were part of a lengthy federal investigation that has amassed evidence of a corrupt pact between the Bukele government and MS-13.
The day after President Trump castigated the North Carolina Republican for opposing the policy bill carrying his domestic agenda, the senator announced he would not seek a third term.
He didn't say who was interested in buying the app, just that it was "a group of very wealthy people." But the Chinese government needs to approve any sale.
A new analysis showing the legislation would be far more expensive than the House version could complicate its chances of final passage in that chamber, where fiscal hawks have said the cost must not grow.
New official estimates showed the bill would swell deficits while slashing health programs and insurance coverage, posing potential problems as the legislation moved forward in the Senate.
Analysis from the nonpartisan Congressional Budget Office found that Republicans' new version of the legislation would make far deeper cuts and lead to more people becoming uninsured than previous proposals.