US President Donald Trump will hunt for support in four battleground states on Monday while Democratic rival Joe Biden focuses on Pennsylvania and Ohio during the final day of campaigning in their long, bitter race for the White House.

The Republican Trump trails Biden in national opinion polls ahead of Tuesday's Election Day. But the race is seen as close in enough swing states that Trump could still piece together the 270 votes needed to prevail in the state-by-state Electoral College that determines the winner...