Trump and his circus of hacks & morons might be one of the most egregious cases in years of an administration doing this, but what you say is true, many previous presidents have poked their political hands into stirring the judicial pot of trying to paint culpability where it hasn't been legally established yet. It's a shame the brainless hie mind decides to downvote this, as they do for all kinds of things they just don't want touching their sensitive little eyes.