Today, voters in Georgia, Alabama, Oklahoma, and Washington, D.C., will go to the polls—or in some cases, return to the polls—to make their pick for a series of local and federal offices. The top races of the night, as far as national observers are concerned, will be held in Georgia, where Republicans are competing for two key offices: the gubernatorial nomination and the Republican Senate nomination. In Alabama—whose electoral politics have recently come into the national spotlight following a major Voting Rights Act-related ruling by the Supreme Court—both parties will make their pick for the statewide U.S. Senate nominee and a Huntsville-based congressional district nominee in two runoff elections....