Optics. "Prosecutorial discretion" is just a fancy name for double standards.
Judge Ellis is not having it.
https://youtu.be/zaknV3FMGow?t=24
https://www.washingtontimes.com/news/2018/jun/28/even-blind-person-can-see-mueller-using-manafort-t/
A federal judge says even a blind person can see that special counsel Robert Mueller is prosecuting Paul Manafort as a way to acquire evidence against his true target, President Trump.
U.S. District Judge T.S. Ellis III made the comment in an opinion released this week that nonetheless sided with Mr. Mueller and against Mr. Trumps former campaign manager. He rejected Mr. Manaforts argument that the Mueller-brought tax-evasion indictment exceeded the special counsels authority and should be dismissed.
Judge Ellis, sitting in the Eastern District of Virginia, expressed dismay at the special counsel system and at Mr. Mueller in particular.
Given the investigations focus on President Trumps campaign, even a blind person can see that the true target of the Special Counsels investigation is President Trump, not defendant, and that defendants prosecution is part of that larger plan, he wrote. Specifically, the charges against defendant are intended to induce defendant to cooperate with the Special Counsel by providing evidence against the President or other members of the campaign. Although these kinds of high-pressure prosecutorial tactics are neither uncommon nor illegal, they are distasteful.