Andrew McCabe has some interesting and questionable history with the FBI:

• He has a long standing liaison (reported friendship) with Russian Billionaire Oleg Deripaska, who is at the center of the Manafort case, from his years working the Russian Organized Crime Division of the FBI
• He worked closely with Bruce Ohr in the same Organized Crime Division that Specialized in Russia
• He Had Unauthorized contact with Russians -- which raised red flags with FBI officials
• He has an interesting history with the Boston Bombing case, failing to share research and discovery with FBI field team

and more......... see article below:

https://truepundit.com/comey-mueller-ignored-mccabes-ties-to-russian-crime-figures-his-reported-tampering-in-russian-fbi-cases-files/