Yes, no, or maybe? See where governors stand on health care law's insurance exchanges

Exchange option: Federal exchange

Medicaid option: Decision pending

Uninsured residents: 562,000

In a Nov. 16 letter, Gov. Scott Walker of Wisconsin said his state would not build a state-based health insurance exchange, deferring instead to the federal government's exchange.

"In Wisconsin, we have been successful in providing health insurance coverage to over 90 percent of state residents without the creation of an exchange and absent federal regulation," Walker wrote. "With more guidance and greater state flexibility, our competitive market system would have ensured health insurance coverage to the most vulnerable Wisconsinites without federalization of our market."

The state's Department of Health Services estimated the costs of running the exchange would have been between $45 and $60 million, the Milwaukee Journal Sentinel reported.