Explainer: Why Has Pennsylvania Not Been Called?

HARRISBURG (AP) – The Associated Press has not declared a winner in the battleground state of Pennsylvania, because there were roughly 1 million votes left to be counted Wednesday afternoon in the contest between President Donald Trump and Democrat Joe Biden.
Pennsylvania is among a handful of battleground states Trump and Biden are narrowly contesting as they seek the 270 electoral votes needed to win the presidency.
Trump, who held a 675,000-vote lead early Wednesday, prematurely declare