US election 2016: Who is Donald Trump?
4 May 2016 Last updated at 11:54 BST
People in the United States will vote for their new president in November 2016.
The person they choose will make important decisions about how the US is run and how it works with other countries.
Both of the main candidates have now been decided, Donald Trump and Hillary Clinton.
Watch Hayley's report to find out the reasons why Donald Trump has been making headlines.