The Michigan Senate is poised to take a vote on whether to make more adults eligible for Medicaid, the government health insurance program for the poor.
Medicaid expansion is a key component of the federal health care law and is supported by Republican Gov. Rick Snyder. But he's had trouble persuading the Senate to go along after the GOP-led House passed legislation in June.
With pressure building, the Senate's Republican leader is planning to call a vote as early as Tuesday afternoon.
Supporters say the Affordable Care Act is here to stay and Michigan can cut the number of uninsured almost in half by expanding Medicaid next year. Critics say "Obamacare" should be rejected at every turn.
If the Senate doesn't vote Tuesday, it could return to the legislation Wednesday.