Senate control still a toss-up as key midterm races remain uncalled

Georgia, Nevada and Arizona's hotly contested races run neck and neck

• US midterm election results 2022: live

Control of the US Senate was still up in the air on Wednesday as several hotly contested seats remained uncalled and the fierce race between Georgia's Democratic incumbent senator Raphael Warnock and his Republican challenger Herschel Walker moved to a runoff.

Warnock is narrowly leading Walker, but neither candidate will be able to clear the 50% threshold needed to win outright after the polls closed on Tuesday and avoid a 6 December runoff, said Georgia's top elections official, Brad Raffensperger.