The delay marks a setback for President Donald Trump, who campaigned on a promise to repeal and replace the Affordable Care Act.
Members of the House Freedom Caucus, a conservative Republican faction, said they had been negotiating possible concessions from the White House.
Trump told fellow Republicans in the House of Representatives they would face "political problems" for opposing the bill that takes apart Obamacare and partially replaces it.
Some conservatives have criticized the bill since Republican House leadership unveiled it earlier this month, dubbing it “Obamacare Lite."
The “negotiation begins” now, the Kentucky Republican says.
Republicans are divided over the plan, with Senate moderates concerned it goes too far and House conservatives saying it does not go far enough.
Trump's first major legislative initiative still faces an uphill battle in the House and later the Senate.
The CBO, a nonpartisan congressional agency, forecast on Monday the plan would increase the number of Americans without health insurance by 24 million.
The Trump administration defended the proposed healthcare overhaul, saying it will offer consumers more choices than Obamacare.
The CBO report forecast 14 million more people would be uninsured in 2018, 24 million more in 2026 if the plan being considered were adopted.
The people who suffered under Obamacare are on the losing end of the deal—again.
The Kentucky senator reintroduced legislation that Republicans put on former President Obama’s desk last year.
House Republicans have revealed their long-awaited replacement for Obamacare. Here, a health care economics expert offers a tour of the new legislation.
Republicans have yet to agree on a single detailed policy proposal to repeal and replace the Affordable Care Act.
Procedural roadblocks will prevent Republicans from passing a replacement law while ignoring Democrats.
46 million Americans have insurance deductibles of $1,000 a year or greater.
Trump's decision to pull advertising about the deadline 'may have cost about 500,000 additional enrollments.'
The president’s orders have grabbed headlines, but there’s no guarantee they’ll be implemented.