Ryan, the top House of Representatives Republican, also continued to champion the legislation, saying on cable news he was open to making "improvements and refinements", but adding, "The major components are staying intact".
Across the Capitol, Sen. Dan Coats as director of national intelligence.
The Budget Committee on Thursday will try to unify the plan into a single bill for consideration on the House floor.
Rep. Justin AmashJustin AmashGOP rep: "Not true" all conservatives back health plan Rep. Steve King: GOP colleagues "patting me on the back" after controversy Ryan-aligned group targets conservatives with robocalls MORE (R-Mich.) says that not all conservatives are warming to the GOP House leadership's bill to repeal and replace ObamaCare.
Members of the conservative Republican Study Committee huddled with Vice President Mike Pence Wednesday to discuss changes they'd like to see including giving states more "flexibility" on Medicaid, cutting the program's expansion off earlier and ensuring that the tax credits offered under the House's American Health Care Act were "fiscally responsible and promote work", according to a handout from the meeting.
Ryan's original plan for the AHCA was to bring it for a full House vote next week, a promise he backed away from at a press conference on Wednesday.
Republicans have been scrambling to salvage their bill after Congress' analysts said some 24 million would be shoved off insurance in the next decade under the GOP bill.
Health and Human Services Secretary Tom Price told House Republicans that one of the changes being considered is allowing states to impose work requirements for Medicaid recipients, an adjustment that could win over some conservatives, The Hill reported.
The measure would strike down much of former President Obama's 2010 overhaul and reduce the federal role, including financing, for healthcare consumers and is opposed uniformly by Democrats. The job of committee members is to simply package legislation approved last week from the House Ways and Means Committee with language from the House Energy Committee and move it on its way.
He said his group has spoken with Senate Republicans about potential changes and will propose an amendment on Monday.
"I don't think there will be meaningful negotiation unless it becomes apparent that the House bill can not pass." he said.
Trump was expected to urge lawmakers to back the bill in remarks later Wednesday in Nashville, Tennessee.
Asked on Hugh Hewitt's radio show about Cotton's opposition, Ryan replied, "I love this, because we've gotten criticized by other folks in the conservative movement for waiting too long".
Right now the credits begin phasing out for people earning $75,000.
In a new complication, Sen.
Three conservative GOP lawmakers voted against the measure.
"I think we're going to have negotiation", he told Fox News' Tucker Carlson.
The bill would enfeeble Obama's individual mandate - the requirement that Americans buy coverage - by abolishing the tax fine on violators.
The CBO projected 52 million people would be uninsured by 2026 if the bill became law, compared with 28 million who would not have coverage that year if the law remained unchanged.
The obstacle for leadership Thursday was to pass the bill through the committee without significant conservative defections.
Nonetheless, experts said the report undercuts Republican claims that the health law's insurance markets are teetering toward collapse, which they say makes repealing the law crucial.