Washington (AFP) – Democrat Joe Biden took the lead in key battleground state Pennsylvania on Friday, where a victory for the former vice president would push him past the threshold of electoral votes needed to win the White House, official data showed.More ballots are yet to be counted, but shortly before 1400 GMT, Biden had moved ahead of incumbent President Donald Trump by more than 5,500 votes, according to official provisional results from the state government.Biden currently has at least 253 electoral votes. The magic number is 270. If he wins Pennsylvania — a state won by Trump in 2016…