"This will go on for years even if there is nothing to see"

Maybe that's the point

I'm sure there is a Sir Humphrey quote about the best way to bury something is to hold a public enquiry. 

Sounds like one of Trump's toadies got caught BIGGLY and they are desperate to bury the story - "We can't fire him for Treason until the enquiry has finished" then bury the results of the enquiry the same day Trump has another boweltweet.