he was butt hurt because Sessions did not warn him about the possible recusal before he was offered the job.
He and Trump were likely both counting on Sessions' meetings with the Russian ambassador not being discovered. But they were, and Sessions had to back out when both parties called for it.
How does one meet at least twice with Sergey Kislyak and not disclose it to the Senate Judiciary Committee during confirmation hearings, anyway?
It's still amazing to think about how many Trump campaign members were up to their ears in personal meetings with Russians.