It seems to be multiple angles on the investigation. There’s already a couple of separate things getting poked at. Flynn. The Russian meeting with JR. Manafort and Kirchner. And the Trump family’s financials. Mueller seems to be treating these almost like separate investigations. Bringing in different prosecutors with expertise in each subject to work specific angles. Calling a new grand jury for a specific event seems to fit with that. It’s very FBI, for the last few decades they work on a task force model. Breaking up duties to different people, teams and organizations with expertise and jurisdiction in specific area.
I doubt we’d see that. Though with a reduction in GOP control of Congress during the midterms we could very well see something immediately after.
It’s just that without a “smoking sun” or something undeniable and obviously illegal tied directly to Trump it remains more convenient for Republican leaders to continue to ignore the problem, or spin it for politics.
So if you ask me best case scenario is major losses for the GOP and especially the Trump faction in 2016 leading to a big acceleration in how fast this moves.
Though honestly something major that changes that tomorrow wouldn’t totally shock me. Trumps people are so damn incompetent. It’s like they can’t help but violate laws, norms, And ethics. And then can’t help but reveal that and run around like a Benny Hill episode making it worse.