After tumultuous campaign, an uneasy American electorate heads to the polls

Americans head to the polls on Tuesday to conclude a bitter and divisive US election campaign, as Republican President Donald Trump seeks to overcome Democratic rival Joe Biden's lead in opinion polls to win four more years in the White House.

The voting caps a campaign dominated by the coronavirus pandemic that has killed more than 231,000 people in the United States and put millions out of work, and shaken by nationwide protests over racial injustice against Black Americans...