Control of the Senate will now officially be determined by 2 January runoff elections in Georgia.

That's after Republican Senator Dan Sullivan of Alaska won re election Wednesday.

Sullivan defeated Al Gross, an independent who ran as a Democrat, in a race that some analysts had seen as an opportunity for Democrats to overtake a Republican Senate seats.

But the race was called Wednesday, with Sullivan leading gross by 20% points.

Republicans now have 50 Senate seats and are looking to add more.

All eyes are now on the upcoming showdown in Georgia, where Republican Senators David Perdue and Kelly Leffler face challenges from Democrats Jon Ossoff and Raphael Warnock, respectively.

Everything's at stake in this election.

On Wednesday, Republicans kicked off an intense campaign for their Georgia run off candidates, with Florida Senator Marco Rubio rallying supporters.

If Republicans win either race, they will keep their majority in the Senate, giving them power to block most of President elect Joe Biden's policy priorities.

Georgia is traditionally Republican leaning, but Biden holds a slim lead in the states.