Just trying to get a firm handle on the chain of events. How long before it appeared Trump made a mistake with Rosentein?
From Wiki:
President Donald Trump nominated Rosenstein to serve as Deputy Attorney General for the United States Department of Justice on February 1, 2017. Rosenstein was confirmed by the U.S. Senate on April 25, 2017. In May 2017, he authored a memo which President Trump said was the basis of his decision to dismiss FBI Director James Comey.[7]
Later that month, Rosenstein appointed special counsel Robert Mueller to investigate alleged ties between the Trump campaign and Russia during the 2016 election and related matters based on the firing of Comey.[8] In July 2018, Republicans in the House of Representatives filed articles of impeachment against Rosenstein, accusing him of incompetence and failure to relinquish classified documents to Congress in connection to the special counsel investigation related to Russian interference in the 2016 United States elections.[9][10]
https://en.wikipedia.org/wiki/Rod_Rosenstein