Judge James Boasberg of the U.S. District Court for the District of Columbia blocks Kentucky from implementing Medicaid work requirements and Arkansas from continuing its program, stating the program's approval by the Department of Health and Human Services "... is arbitrary and capricious because it did not address ... how the project would implicate the 'core' objective of Medicaid, the provision of medical coverage to the needy".
A severe storm system brings tornado watches and warnings throughout the U.S. states of Oklahoma, Texas, Arkansas, and Missouri. A "large and dangerous" tornado is confirmed near Gore, Oklahoma. Several other tornadoes are seen by storm chasers.
Voters in the US states of Arkansas and Kentucky go to the polls, with Mitt Romney winning the Republican primaries, and President Barack Obama winning but performing relatively poorly against token opposition in the Democratic primaries.
Tornadoes touch down in midwestern and southern United States, including Washington County, Arkansas; Greater St. Louis, Sunset Hills, Missouri, Illinois and Oklahoma, with a few tornadoes in the early hours of January 1, 2011. A total 36 tornadoes touched down, resulting in the deaths of 9 people.