WASHINGTON — As an anxious nation watched into the wee hours of the morning Friday, Joe Biden took a slim lead in Georgia with the fate of the presidency remaining unknown and five closely watched states continuing to count ballots almost two days after polls closed. The unresolved election stoked tensions as voters — who turned out in record numbers — seek resolution of a campaign marked by intensifying polarization and a global pandemic that counts the president among its stricken. President Donald Trump continues to fight for his re-election by trying to generate unfounded fears about the tabulation process. His campaign filed multiple lawsuits, several of which have already been thrown out, and more are expected. Trump fired off all-capital-letter tweets demanding that officials halt counting and leave ballots uncounted in places where analysts think the remaining votes favor Democrats.