This isn't Jeb Bush in the White House. It's Donald Trump.
He probably already knows what a Congressional investigation is going to find, and if they try not to find it he is going to make sure it gets shoved in their collective faces even if he has to do it via Twitter messages at 5:30 AM.
Even as recently as a few years ago I never believed in my wildest dreams that I'd see a U.S. President post a message like this about the Senate minority leader:
They have been tapping his phones for 6 mos and if they had found anything they would have leaked it by now.