"stacks of resignation letters"

Once again, the press from across the pond are the ones breaking the stories about American politics. Here's another possible motive for why Comey re-opened the investigation.

'Some people, including department heads, stopped talking to Jim, and even ignored his greetings when they passed him in the hall,' said the source. 'They felt that he betrayed them and brought disgrace on the bureau by letting Hillary off with a slap on the wrist.' 

According to the source, Comey fretted over the problem for months and discussed it at great length with his wife, Patrice.  

He told his wife that he was depressed by the stack of resignation letters piling up on his desk from disaffected agents. The letters reminded him every day that morale in the FBI had hit rock bottom.

The FBI was one of the few agencies in the entire US government that still had some shreds of integrity left after Obama and Clinton turned the government into their own private gangster group.  Comey tossed that integrity out the window when he refused to prosecute Clinton for her multiple felonies.  And the rank and file of the FBI were furious.  ARE furious.

And it's amazing how much you can learn when you read a newspaper that isn't staffed with Democrats all desperate to get Hillary Clinton elected.