The upcoming debate between Donald Trump and Kamala Harris may be more pivotal than most in US politics.
The importance of the debate lies in the fact that surveys suggest the race is a statistical dead heat nationally and in key battleground states.
While Harris has the opportunity to flesh out her positions before an audience of tens of millions, she will also be under fire from her Republican opponent.
Harris must defend the Biden administration’s record on areas where polls show Democrats are weak, such as border security and inflation.
Trump, on the other hand, must avoid coming across as domineering or belittling towards Harris, who is the first woman of colour to be a presidential nominee.
Both candidates have used markedly different ways of preparing for the debate.
Despite election day not arriving until November, early voting is set to begin this month in some key battleground states including Pennsylvania.
The debate could help set the political environment for the last two months of the campaign and also be the last chance for the two candidates to reach some voters in states where every ballot matters.