2:48
23 September 2016
24 October 2016 Last updated at 20:36 BST
Among millennial voters Donald Trump is struggling.
A USA Today/Rock the Vote survey from October had Hillary Clinton leading the Republican Party nominee by 48 percentage points in the age group 18-35.
The BBC spoke to Trump supporters at North Carolina State University to find out why they are standing behind the businessman.
Produced by the BBC's Franz Strasser, Adam McIlrick and Jane O'Brien.