If Comey had not informed Congress after testifying to them that the case was over, he could have been accused of perjury or covering up information against Hillary to help her win.

Via Zero Hedge:

According to the New Yorker, “Comey’s decision to make public new evidence that may raise additional legal questions about Clinton was contrary to the views of the Attorney General, according to a well-informed Administration official. Lynch expressed her preference that Comey follow the department’s longstanding practice of not commenting on ongoing investigations, and not taking any action that could influence the outcome of an election, but he said that he felt compelled to do otherwise.”

Traditionally, the Justice Department has advised prosecutors and law enforcement to avoid any appearance of meddling in the outcome of elections, even if it means holding off on pressing cases. One former senior official recalled that Janet Reno, the Attorney General under Bill Clinton, “completely shut down” the prosecution of a politically sensitive criminal target prior to an election. “She was adamant—anything that could influence the election had to go dark,” the former official said.
And the punchline:

“According to the Administration official, Lynch asked Comey to follow Justice Department policies, but he said that he was obliged to break with them because he had promised to inform members of Congress if there were further developments in the case. He also felt that the impending election created a compelling need to inform the public, despite the tradition of acting with added discretion around elections. The Administration official said that Lynch and Justice Department officials are studying the situation, which he called unprecedented.”

Because meeting with Bill Clinton in the back of an airplane is ‘consistent’ with Department policies…

HT: Deplorable Xenophobe Perry