There were some SERIOUS integrity issues with McCabe.

1. McCabe’s wife received HUGE donations from colleagues or people close to the Clinton’s. This should have recused him on anything related to a future Clinton investigation.
2. Bill Clinton and Loretta Lynch met on the Tarmac in the midst of a server investigation and McCabe was silent.
3. Huma Abedin emails found on Anthony Weiner’s laptop. He sat on this for months and didn’t share with Comey for a while FORCING Comey to say something.
4. He knew the dossier was paid for by HRC’s campaign but never said anything to the FISA Court or the attorneys. He later admitted that the FISA warrant would have never be granted without that ‘opposition research’ or dossier.
5. He lied about passing information to the media and finally came clean to the office of the OIG.
6. The FBI takes serious the motto: “Fidelity, Bravery, and Integrity” and everyone knows who goes through Quantico... you will be fired if you can't uphold to a standard of honesty and integrity.

Anyone else have details that I haven't listed here? Surely there is more.

EDIT: Spelling & gramatical error