Joe Biden won the 270 Electoral College votes when he secured Pennsylvania on Saturday, having overturned a deficit that, at one point, was about 500,000 votes.
Nevada was also called for the now President-elect less than an hour afterwards.
Arizona has been called for Biden by the Associated Press but many other media organisations are still unsure, and it remains a tight battle.
Georgia is the surprise package with the traditionally Republican state only having a narrow lead for Donald Trump.
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