Voters in the US go to the polls on 5 November to elect their next president.

Voters in the US go to the polls on 5 November to elect their next president.
The election was initially a rematch of 2020 but it was upended in July when President Joe Biden ended his campaign and endorsed Vice-President Kamala Harris.
The big question now is – will the result mean a second Donald Trump term or America’s first woman president?
As election day approaches, we’ll be keeping track of the polls and seeing what effect big events like Tuesday’s presidential debate have on the race for the White House.

Who is leading national polls?
In the months leading up to Biden’s decision to drop out of the race, polls consistently showed him trailing former president Trump. Although hypothetical at the time, several polls suggested Harris wouldn’t fare much better.
But the race tightened after she hit the campaign trail and she developed a small lead over her rival in an average of national polls that she has maintained since. The latest national polling averages for the two candidates are shown below, rounded to the nearest whole number.

In the poll tracker chart below, the trend lines show how those averages have changed since Harris entered the race and the dots show the spread of the individual poll results.
Harris hit 47% during her party’s four-day convention in Chicago, which she brought to a close on 22 August with a speech promising a “new way forward” for all Americans. Her numbers have moved very little since then.
Trump’s average has also remained relatively steady, hovering around 44%, and there was no significant boost from the endorsement of Robert F Kennedy, who ended his independent candidacy on 23 August.

While these national polls are a useful guide as to how popular a candidate is across the country as a whole, they’re not necessarily an accurate way to predict the result of the election.
That’s because the US uses an electoral college system to elect its president, so winning the most votes can be less important than where they are won.
There are 50 states in the US but because most of them nearly always vote for the same party, in reality there are just a handful where both candidates stand a chance of winning. These are the places where the election will be won and lost and are known as battleground states.
What is the electoral college?
Who is winning in battleground states?
Right now, the polls are very tight in the seven battleground states, which makes it hard to know who is really leading the race. There are fewer state polls than national polls so we have less data to work with and every poll has a margin of error that means the numbers could be higher or lower.
As is stands, recent polls suggest there is one or less than one percentage point separating the two candidates in several states. That includes Pennsylvania, which is key as it has the highest number of electoral votes on offer and therefore makes it easier for the winner to reach the 270 votes needed.