WILLIAMSBURG, Va. (AP) — Millions of uninsured people may have to wait until after Election Day to find out if and how they can get coverage through President Barack Obama's health care law.

More than two weeks after the Supreme Court gave the green light to Obama's signature legislative achievement, many governors from both parties said they haven't decided how their states will proceed on two parts under their control: an expansion of Medicaid, expected to extend coverage to roughly 15 million low-income people, and new insurance exchanges, projected to help an additional 15 million or so purchase private insurance.

In some states, such as Colorado, Oklahoma and Wyoming, governors said they're crunching the numbers to determine what's best for their residents. But in other states, including Virginia, Nebraska and Wisconsin, Republican governors said not to expect a decision before Obama and Republican challenger Mitt Romney square off in November.