Also keep in mind that despite all the crap going on around Trump back to 2016 maybe even 2015 and yet admiral Mike Rogers did not go to Trump tower untill after Trump was elected president. Why? Because he was finally legally allowed to reveal that intel information to the president elect. The good guys play by the rules sometimes that takes a little extra time and effort.
Mike Rogers first met with Donald Trump in November of 2016, while Rod Rosenstein was appointed to his current position at the end of April 2017... hopefully the president was brought fully up to speed on RR by then in spite of the advice/assistance of GOP-e imbeds (past and present).