It is not easy to prove legally that someone is biased or being prejudiced against another party. The accused party can easily cook up excuses to hide his bias. Very few disgruntled employees can prove convincingly that their boss discriminated against them during promotion even if it's true. I wonder how Amazon did it.
I don't follow President Trump's tweets. It's hard to believe a politician will publicly reveal his animosity towards the richest man in the world on social media. It's politically incorrect and dumb. Hard to believe that a top politician actually did that.
Forget political correctness, utopia and what not. Welcome to the real world. It's better to know a president's stand on issues so that you can vote accordingly. Rather than voting for someone that you are not sure where he stands.