*Do or die battle for Donald Trump and Biden as US presidential elections enter last stretch*

Washington, Nov 01: The US presidential elections entered its last stretch on Sunday with the two candidates, Republican incumbent Donald Trump and his Democratic challenger Joe Biden, leaving no stone unturned to swing votes in their favour.

Trump, 74, and Biden, 77, and their campaigns are making a last ditch effort to convince voters of their plans and policies if voted to power, with polls indicating that the race is tightening more than ever and making it a do or die battle for the two leaders.

Till Saturday, more than 92 million Americans have already cast their ballots, setting a new record.

This includes 33 million in-person votes and 58 million mail-in ballots.

However, all eyes are on November 3, the day of polling and the counting of votes would start soon after the closing of votes, which changes from state to state and also depends on the time zone.

Fighting the toughest political battle of his life, Trump spent his entire Saturday in Pennsylvania, a key battleground state, addressing as many as four rallies.

Pennsylvania, as per American political analysts, has emerged as the key battleground state which is a must win for Trump to retain his White House residency for another four years.

In Pennsylvania, Trump is trailing behind Biden by four percentage points, according to the latest average of polls by Real Clear Politics. In battleground states, Biden is leading by 3.7 percentage points.

Both candidates are competing to win electoral college votes. Each state gets a certain number of electoral college votes partly based on its population and there are a total of 538 up for grabs, so the winner is the candidate that wins 270 or more on Tuesday.

Both Trump and Biden were off to key states for last-minute election campaigning. Trump left for another round of election rallies to five battleground states -Washington in Michigan, Dubuque in Iowa, Hickory in North Carolina; Rome in Georgia and Opa-Locka in Florida.

Biden is travelling to Pennsylvania to discuss bringing Americans together to address the crises facing the country and winning the battle for the soul of the nation, his campaign said.

He will deliver remarks at a "Souls to the Polls" event in Philadelphia to get out the vote with faith voters and leaders. He is also scheduled to deliver remarks at a drive-in event in Philadelphia. A day earlier, Biden was joined by former US President Barack Obama for two rallies in Michigan.

Biden's running mate Senator Kamala Harris has campaign stops on Sunday in Georgia and North Carolina.

Before leaving on his day long campaign trail, Trump in a tweet exuded confidence that his numbers are looking very good.

"Our numbers are looking VERY good all over. Sleepy Joe is alrea