"The allegations against McCabe come largely from Justice Department Inspector General Michael E. Horowitz, whose office concluded in a detailed report McCabe lied at least four times, three of them under oath, and he approved a media disclosure to advance his personal interests over those of the Justice Department."
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https://www.washingtonpost.com/world/national-security/prosecutors-use-grand-jury-as-investigation-of-andrew-mccabe-intensifies/2018/09/06/aa922b2e-b137-11e8-9a6a-565d92a3585d_story.html?noredirect=on&utm_term=.023ca3ec75fa