(CNN)The national conversation around health care is increasingly about "Medicare for All," but Democrats are still working to bring Republican states on board with expanding access to a different government program -- Medicaid.

Under the Affordable Care Act, states can get federal money to pay for adding people to the program for low-income Americans, but 14 states never accepted it.

Kansas lawmakers have taken the first step toward passing Medicaid expansion, with the Republican-dominated legislature last week voting in favor, two years after a similar initiative was vetoed by former Republican Gov. Sam Brownback. The state's current Democratic Gov. Laura Kelly, who made Medicaid expansion a centerpiece of her 2018 campaign, has vowed to sign the bill if it passes.