ATLANTA (AP) — Polls began to close Tuesday night in the country's final Senate contest, as Georgia voters await a winner in the runoff election between Democratic Sen. Raphael Warnock and Republican football legend Herschel Walker.

The contest will determine whether Democrats gain an outright 51-49 Senate majority or retain their bare control of a 50-50 chamber based on Vice President Kamala Harris' tiebreaking vote. Last year, runoff victories by Warnock and fellow Georgia Democrat Jon Ossoff gave the party that razor-thin edge.

In the November election, Warnock led Walker by about 37,000 vo...