I really hope I'm cynical and wrong but I doubt it. Without congressional investigations nothing will happen. So far they haven't really stood up to Trump on anything else, not sure why they'd start now.

Maybe after they repeal the ACA and cut taxes on the rich they do something, but they'll need Trumps cooperation to make those first two things happen.

If the president actually colluded with the Russians I'd say it's substantially bigger than Watergate.