President Donald Trump had made it very clear that he was not happy that Attorney Jeff Sessions recused himself from the Russia probe. From the very beginning, Sessions was one of Trump’s biggest supporters and it obviously helped secure the job for the senator.
A recusal, to disqualify oneself as a judge in a particular case, is necessary when a “judge” has a conflict of interest in the case, which Sessions undoubtedly had.
On March 2, Sessions recused himself, against the president’s wishes, due to the fact that he spoke with Russia’s Ambassador to the U.S. It’s not the conversation that was necessarily bad, but the idea that it wasn’t disclosed that had the media in a frenzy because it was felt that something was hidden. Under lots of pressure, Sessions decided to do what was felt to be the noble move and recuse himself from the investigation.