There are now six Republican presidential hopefuls scheduled to speak at a Republican conference on Mackinac Island next month.
Kentucky Senator Rand Paul is the latest to confirm for the 31st Biennial Mackinac Republican Leadership Conference.
Already scheduled are former Florida Governor Jeb Bush, Texas Senator Ted Cruz, former Hewlett-Packard CEO Carly Fiorina, Ohio Governor John Kasich and Wisconsin Governor Scott Walker.
The conference is set for the weekend of September 18.