Republican Gov. Sam Brownback is facing new questions about his administration’s overhaul of the Medicaid program in Kansas as his close race for re-election nears its end.

Brownback said Wednesday that the overhauled program known as KanCare is working well for the needy and disabled Kansas residents who receive health coverage under it.

Democratic challenger Paul Davis said KanCare is operating under a cloud.

A new University of Kansas study suggested that a significant number of disabled Kansans have experienced some problems with their services since management of Medicaid was turned over to three private health insurance companies in 2013.

And a former executive with one of the companies filed a federal lawsuit this week alleging she was wrongly terminated for protesting potentially improper cost-saving measures.