The US presidential debate looks to be a chance to get to know the candidates. 

Vice President Kamala Harris is facing off against Donald Trump for the first time at 1pm our time in Pennsylvania.  

No notes are allowed, and microphones will cut off when each candidate's not speaking. 

Former US Ambassador to New Zealand under Barack Obama, Mark Gilbert told Ryan Bridge many polls show people still don't know Harris. 

He says this will be an opportunity for her to be seen, as more than 50-million people are expected to tune in. 

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