Twin runoff elections in the US state of Georgia on Tuesday are set to determine whether President-elect Joe Biden's Democratic Party will gain control of the Senate.
Two seats are to be contested. If Democrats fail to secure both of them, Republicans will gain control of the Senate, as the party will secure 52 seats in the 100-member chamber. Since the Democrats maintained control of the House of Representatives in the elections held in November, Biden's administration will then have to contend with a divided Congress.
But if the two Democratic candidates defeat the incumbent Republican senators, the Democrats will also have a majority in the Senate, since Vice President-elect Kamala Harris will head the Senate after she takes office and can cast the deciding vote.
President Donald Trump and Biden are set to stage rallies in Georgia during the closing hours of the heated election campaign.
The latest opinion polls show both of the Democratic candidates around one point ahead of their Republican rivals.
All eyes in the US are on the Georgia runoffs, with the outcome set to determine the fate of Biden's top priority policies, including urgent moves against the COVID-19 pandemic, economic policy, and climate change.