NEW YORK (AP) — The Trump administration will require all 50 states to explain their plans to revalidate some of their Medicaid providers in a national escalation of anti-fraud efforts that have so far largely focused on specific states, Dr. Mehmet Oz said Tuesday. The Centers for Medicare and Medicaid Administrator said during a Politico health care summit that his agency plans to ask states to “own” the problem of health care fraud this week with requests for states to share their 30 a...