An expansion of Medicaid is supposed to cover more of the working poor. But Republican-led states have been opting out and outlying areas in states like Tennessee may be the hardest hit.

In Oregon, researchers followed 10,000 new enrollees in Medicaid. They used more health care services, but had more to spend on other necessities.

For states considering not to expand Medicaid, the program for the poor and disabled, it's all a numbers game.

One of the Affordable Care Act's fiercest critics, Florida's Republican Governor Rick Scott has reversed courses and is dropping his opposition to expanding Medicaid.

Alabama joins a slew of lawmakers who are ambivalent about taking funds from the Fed to cover the millions more people who will become eligible for Medicaid under Obamacare.

The $5.7 billion deal with let Aetna double its number of Medicaid members.

Oregon will take federal money to expand Medicaid, and try to cut costs too.

A report from the Congressional Budget office says President Obama's health care law could save the federal government $84 billion over the next decade. That savings is mostly because of the Supreme Court ruling last month, and a part of the law it ruled out.

It's supposed to be a health care program for the poor. But over the years, the definition of poor has changed.

The giant health insurer will acquire competitor Amerigroup Corp. for nearly $5 billion in a bid for more Medicaid business.