What happens next in the US election?

Millions of people voted by post amid the pandemic, leading to delays due to the volume of ballots, how they are counted and the time taken to deliver them.

Volunteer election worker Cecilia Chaboudy-Dow demonstrates in Houston, Texas (David J Phillip/AP)

After millions of Americans went to the polls on Tuesday, delays and potential legal battles may loom over the election for days to come, as the outcome is still too close to call.

The contest between Donald Trump and Joe Biden may remain on a knife-edge for days, with both men still in with a chance of winning enough Electoral College votes from the undeclared states to secure the presidency.