Former President Donald Trump (L) and Florida Gov. Ron DeSantis (R).Paul Hennessy/SOPA Images/LightRocket via Getty Images and Scott Eisen/Getty Images Donald's Trump campaign plans to blacklist anyone who works for Ron DeSantis' book tour or presidential campaign. During his presidency Trump was known to put candidates through loyalty tests. DeSantis is Trump's fiercest political rival, but polls show the former president surging ahead. Donald's Trump campaign plans to blacklist anyone who works on Florida Gov.