Hospitals agreed to Medicare cuts in the health care law, banking on the Medicaid expansion to compensate them.
"We've got a significant debate coming in January," said Kirby. "There are a lot of people tuning in to this issue."
In Maine, Democrats who gained control of the Legislature in the election are pushing to overcome Republican Gov. Paul LePage's opposition.
"Obamacare" was once assailed as a job killer by detractors, but on Wednesday in Missouri it was being promoted as the opposite. Missouri's hospital association in released a study estimating that the economic ripple effects of the Medicaid expansion would actually create 24,000 jobs in the state. The University of Missouri study found that about 160,000 state residents would gain coverage.
"This is not a political issue for us ... this is the real world," said Joe Pierle, head of the Missouri Primary Care Association, a doctors' group. "It makes no sense to send our hard-earned federal tax dollars to our neighbors in Illinois."
By Thursday, Gov. Jay Nixon, D-Mo., had announced his support for the expansion, but he faces a challenge in persuading Republican legislative leaders.
In Florida, where GOP Gov. Rick Scott says he is rethinking his opposition, the state could end up saving money through the Medicaid expansion, said Joan Alker, executive director of the Georgetown University Center for Children and Families, which studied the financing. The reason is that Florida would spend less on a state program for people with catastrophic medical bills.
Back in Washington, Health and Human Services Secretary Kathleen Sebelius says states can take all the time they need to decide. They can even get a free trial, signing up for the first three years of the expansion and dropping out later.
But she hasn't answered the one question that many states have: Would the Obama administration allow them to expand Medicaid just part way, taking in only people below the poverty line? That means other low-income people currently eligible would be covered entirely on the federal government's dime, and they would be getting private coverage, which is costlier than Medicaid.
Matt Salo, executive director of the National Association of Medicaid Directors, says he doesn't think states will get an answer anytime soon.
"This is a game of chicken that we're seeing," said Salo. "Are the states bluffing, or are these states really serious? And at what point does the administration rethink things, and decide it's worth getting half a loaf?"