EXPLAINER: Why the AP hasn't called Georgia's close race

Tens of thousands of still-uncounted ballots — many in counties where Democrat Joe Biden was in the lead — are what's making the Georgia contest between President Donald Trump and Biden too early to call.Trump and Biden were locked in a tight contest Thursday to secure the 270 electoral votes needed to win the presidency.Georgia is a must-win state for Trump, who has a narrower path to victory than Biden.