TULSA — Almost 6,000 SoonerCare enrollees lost coverage Dec. 1 because they were unable to provide proof of citizenship, the Oklahoma Health Care Authority announced at its monthly meeting Thursday. Most of the 5,841 people who lost Medicaid benefits through the SoonerCare program are U.S. citizens, the authority noted in a news release. The federal Deficit Reduction Act of 2005 changed how states must v...