Biden vs Trump: US election 2020 where the race stand?
Although polls suggest that Biden is well ahead of Trump in the election, the general consensus is the election is going to be much tighter than polls suggests

With one day to go before election day on November 3, former vice-president Joe Biden, the Democratic party’s nominee, is polling narrowly ahead of incumbent Republican President Donald Trump in key battleground states, though he has seen his lead narrow in some states since the summer.
The president of the United States isn’t directly elected by American voters, but by members of what’s called the electoral college. The electoral college is a group of people that cast their votes and have the final say on who becomes president and vice president.
Each state gets a certain number of electoral votes based on the number of representatives they have in Congress (House and Senate). This is based on population numbers that are tracked every ten years.
There are currently 538 electors, and an absolute majority of electoral votes, 270 or more, is required to win the election.
A presidential candidate needs more than half of the electoral vote to win. Because of the electoral college, it is possible for a candidate to win the presidency even if they didn’t win the most votes, called the popular vote, during the national election, like Trump back in 2016.
Since the election of 1824, 48 states have appointed their electors winner-take-all, based on the statewide popular vote on Election Day. Maine and Nebraska are the exceptions.

Electoral votes allocated to each state and to the District of Columbia for the 2012, 2016 and 2020 presidential elections, based on populations from the 2010 Census (Total: 538)
Wikipedia
Battleground States
This winner takes all modal limit presidential election fight to a few states. Swing states, also known as battleground states or purple states, are highly competitive states that have historically swung between voting for different parties in presidential elections. While most states consistently vote along party lines.

