What Grenell may lay out (on purpose or by accident) is that it wasn’t limited to just Trump’s campaign, but to include several Senators and House members (all GOP). At that point, these guys will wake up and realize that they were being reviewed, and a bigger mess will be created.
My humble guess is that by late summer, they will go all the way back to 2009’s unmasking efforts, and a special prosecutor will have to be appointed to lay out the hundreds of individuals who were spied upon. Various scandals will have been laid out where some Democratic insider went to such-and-such Senator, and told them to retire or this ‘affair’ would be revealed.