The first televised debate between the US presidential nominees has begun in Hofstra University in New York.
Democrat Hillary Clinton and Republican Donald Trump are taking 90 minutes of questions.
The debate started off on economic issues, with Trump saying trade deals need to be renegotiated in order to prevent Americans from losing their jobs.
Clinton hit back, and accused Trump's economic platform of amounting to "the most extreme" package of tax cuts for the wealthy in US history.
This is the first of four debates for the election - three presidential and one vice presidential.
As many as 100-million people in the US are expected to tune in. Opinion polls show both candidates in a very tight race, and the debate is expected to sway undecided voters.