Washington — Voters are casting their ballots in three states and the District of Columbia on Tuesday, including a high-profile runoff race to take on Georgia Democratic Sen. Jon Ossoff and GOP runoffs in the Georgia governor's race and the Alabama Senate race. Here are the major races to watch on Tuesday:  Georgia runoff in GOP Senate primary Two Republicans are facing off in Tuesday's Senate runoff in Georgia as they vie for the chance to take on Ossoff in November. After no candidate secured