Comey’s congressional testimony about the FBI investigation into possible collusion between Russian officials and the Trump campaign was reportedly postponed so he could speak with Mueller in advance. Franks called the delay “collusion.”
https://pjmedia.com/news-and-politics/2017/05/24/congressman-comey-meeting-with-mueller-before-russia-testimony-is-collusion/
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Former FBI Director Jim Comey "closely coordinated" with Special Counsel Robert Mueller before his planned testimony before the Senate Intelligence Committee about his interactions with President Trump.
http://www.washingtonexaminer.com/comey-closely-coordinated-with-mueller-on-trump-testimony-report/article/2625276
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Before he’ll testify before Congress, Comey wants to meet with recently appointed Special Counsel and fellow Former FBI Director Mueller.
http://legalinsurrection.com/2017/05/comey-hearing-postponed/
“Mission Creep” That’s a pretty apt description of the current Robert Mueller himself. With the emphasis on CREEP! IMHO.