NONE. There is NO scandal that would cause me to not vote for the Democrat in 2020. Even though I’m almost certain to be in be in solid blue Illinois or even more blue DC in November 2020, I will never not vote, chase a 3rd party unicorn, or do a senseless write in.
It’s fine for me, as a nobody, to argue politics on Twitter. It’s not ok for the president to shake up the financial markets because he’s negotiating trade policy on Twitter!