The only problemo with that is that the Dems won't be able to keep these hearings going that long. When all of the major players have pled the fifth and they've covered the few witnesses they have, there's nothing else to hear. If there IS to be any action, it could come in a court of law, but that's going to be WAY down the road, time-wise...not sustainable as an election-killer.
For instance, take Kenlay. All Kenlay has to do is show up next week and invoke the fifth. That's it. They're done with him. Oh, they might grandstand around for a couple of hours, trying to get their asinine questions into the Congressional Record, but that's still it. Lay Is Over In A Day. Same with everyone else. After a while, you run out of questionees. When that happens, the hearings are OVER.