ATLANTA — Voters in Georgia headed to the polls Tuesday to cast their ballots in two Senate runoff races that have captured the national spotlight, shattered fundraising records, and will decide which party takes control of the U.S. Senate under a newly elected president.

Millions of dollars have been poured into the campaign coffers of incumbent Republican Sens. David Perdue and Kelly Loeffler, as well as their Democratic challengers Jon Ossoff, an investigative journalist, and Raphael Warnock, a prominent black preacher.