Americans have rushed to vote early, already casting nearly 60 million mail-in ballots.
Biden leads in national opinion polls though the race is seen as close in enough battleground states.
Current president is a comfortable choice, but New Delhi could warm up to Biden.
Opinion polls show Trump trailing Biden nationally, but with a closer contest in the most competitive states that will decide the election.
The transition between election and inauguration is a quirk of American politics: the more than two-month gap is particularly long.
Here is a look at a possible first 100 days of a Biden presidency.