White House race: What happens if the US poll outcome is disputed?

US President Donald Trump claimed victory over Democratic challenger Joe Biden despite incomplete results from battleground states that could determine the outcome of the presidential race. This could set off any number of legal and political dramas in which the presidency could be determined by some combination of the courts, state politicians and Congress. Watch this video to know the various ways the 2020 US election results can be contested. (Text: Reuters)