We don't really know that. I know that POTUS has said so but he's said a lot of things about Sessions. It's a Playhouse 90 IMHO. They didn't want the DS to know what they were up to and I believe they pulled it off.
Sessions really had no choice but to recuse. He was a part of the campaign...no matter how peripherally...and he's NOT a democrat. Therefore he did the honest and honorable thing.
http://www.freerepublic.com/focus/news/3704446/posts?page=44#44
explanation of that consent decree...
Entire US Election System in Question: Fraudulent and Suspicious Activities Reported Nation-wide
GATEWAY PUNDIT ^ | 11/9/2018 | Jim Hoft