Donald Berwick is one of the dangerous men Democrats are using to try to make single-payer health care a reality in the United States.

If anyone had doubts about the radical nature of Democrats' health care agenda, they needn't look further than the second name on the witness list for this Wednesday's House Ways and Means Committee hearing on single-payer health care: Donald Berwick of the Institute for Healthcare Improvement.

If that name sounds familiar, it should. In summer 2010, right after Obamacare's passage, President Obama gave Berwick a controversial recess appointment to head the Centers for Medicare and Medicaid Services (CMS). Democrats refused to consider Berwick's nomination despite controlling 59 votes in the Senate at the time, and he had to resign as CMS administrator at the end of his recess appointment in late 2011.