Among Oklahomans, Mr. Cook and Mr. White are hardly alone. Though the state’s Democrats still outnumber its Republicans, you would never know it by looking at the election results. Oklahoma voters went for Senator John McCain by almost two to one, bucking the tide that swept Mr. Obama to the presidency. Not a single one of the state’s 77 counties backed Mr. Obama, despite his endorsement by the popular Democratic governor, Brad Henry. ... Indeed, the state has a political landscape closely resembling that of the old solidly Democratic South, especially in its southeastern corner, known as Little Dixie, where...