A record 3M+ Georgians have already voted in the Senate runoff races. (CNBC)

All eyes are on Georgia this week as the state's two Senate runoff races come to a head Tue. Here's what you need to know.

A lot is at stake tomorrow: both Senate runoff races will decide the Senate majority—and Pres.-elect Joe Biden's agenda.

The Senate currently has 50 Republicans and 48 Democrats; Democrats need to win both races to flip the chamber.

Tue.'s election will also serve as a test for Georgia Democrats on the state's future as a "purple" battleground state.

Biden scored a historic win in Georgia in Nov.'s election, flipping the state blue for the first time since 1992. (CNN)

According to FiveThirtyEight's polling average, Jon Ossoff leads incumbent GOP Sen. David Perdue by 1.6 points, as of Mon..

Perdue is currently in isolation after being exposed to a campaign staffer that tested positive for COVID-19. (NPR)

Rev. Raphael Warnock is also leading incumbent GOP Sen. Kelly Loeffler in FiveThirtyEight's polling average by 2.1 points.

The Georgia Senate runoff races have already seen record turnout: 3M+ people voted early before Election Day. (CNBC)

Per CNBC, "Democrats hold an advantage in early voting turnout in Georgia."

Both Democratic candidates have also outraised their opponents: Ossoff has raised a record $106.8M+ since Nov. (Politico)

Polls in Georgia will open tomorrow at 7 am ET, and close at 7 pm ET. Ballot counting will begin at 7 pm ET.

How soon will we know the results? With record early voter turnout, it could be days until we know the final results.

Here are some GIFs to use tomorrow on Election Day.