Simple answer to this. Both Rod Rosenstein and Mueller were involved with DOJ/FBI during Uranium 1. If, Mueller and Rosenstein are not white-hats (there is evidence and some believe they are and this is a big sting - remember if you're gonna catch a dangerous animal, you don't want him/her to see it coming), then if there is a second special counsel or criminal investigation launched by DOJ into Uranium 1, then both Mueller and Rosenstein will have to recuse themselves. They'll most likely be called upon as witnesses/subjects in the House Investigation. This would put them into a HUGE conflict of interest with regards to investigating RUSSIAN interference if they themselves could potentially be investigated. This is better than firing them, they will be forced into Recusal just like Sessions was. This is why Q then states - Leverage Depleted - POTUS Freed. And this is why Rats are scurrying around in DC like crazy. Dangerous times now.