Trump (especially his father) have many allegations about racism that kept creeping out during the Primaries.     I think part of Trump's appointment of Sessions was a big fat finger to those that ever mentioned the past allegations.

Sessions was denied a judicial appointment way back in 1986 (Ronald Reagan era.   Reagan nominated him).    4 DoJ lawyers testified at his confirmation that Sessions had a history of making racially offensive remarks in his professional life.      His confirmation failed.     Now he's the Attorney General?

So this is a case of a good thing coming for the wrong reasons.   Trump doesn't want the Russia investigation to proceed, is clearly interfering in the process and his guy Sessions is now in the cross hairs (because he recused himself because he's embroiled in it too).      

Good riddance - hopefully Trump will be gone too, before his term is up.     (of course then they get President Pence...)