The House of Representatives began the process of dismantling the Affordable Care Act on Friday, approving a budget resolution on a mostly party line vote.

President-elect Donald Trump said in a weekend interview that he is nearing completion of a plan to replace President Obama’s signature health-care law with the goal of “insurance for everybody,” while also vowing to force drug companies to negotiate directly with the government on prices in Medicare and Medicaid.

UnitedHealth Group, one of the largest and most diversified health insurance companies in the United States, said on Monday that it planned to buy Surgical Care Affiliates, a chain of outpatient surgery centers, for about $2.3 billion. The deal is expected to close in the first half of 2017.

Six years ago, federal health officials were confident they could save taxpayers hundreds of millions of dollars annually by auditing private Medicare Advantage insurance plans that allegedly overcharged the government for medical services.

The Obama administration on Tuesday starkly warned Republicans against a "repeal-and-delay" strategy on Obamacare as it announced that more than 11.5 million Americans have signed up for health insurance coverage on government-run marketplaces this enrollment season — a slight increase from last year.

Giving Medicare authority to negotiate drug prices is the best way to keep those spiraling costs under control for the program’s recipients, departing Health and Human Services Secretary Sylvia Burwell said Monday.