To understand the courage that witnesses like Marie Yovanovitch have shown during the Ukraine investigation, it’s worth looking back on a couple of the other signature moments of the Trump era.
One was in the summer of 2016, when James Comey, then the FBI director, faced an uncomfortable choice. He and his colleagues had concluded that Hillary Clinton should not be prosecuted for using a private email account to conduct government business. Her conduct was sloppy and inappropriate, but it was also fairly common and not close to being criminal.
Still, Comey knew that Republicans would vilify him for his decision not to prosecute.