The Senate parliamentarian has advised a key Medicaid provider tax overhaul that's central to President Donald Trump's big tax cut and spending bill does not adhere to procedural rules.

A Republican plan to cut $250 billion in Medicaid and other health-care spending hit a procedural roadblock in the Senate Thursday, complicating efforts to pass President Donald Trump’s massive tax and spending package.

Some conservatives called for the parliamentarian to be fired or overruled after she determined a series of policies in the legislation didn't comply with Senate budget rules.