lionheart I so agree. The horrible, horrible pause when Kavanaugh was asked several times (by Kamala Harris?) if he would support or ask for an FBI investigation was 
That's when Lindsay Graham leapt in on his behalf. And according to Maddow, that's the point when the Repugs stopped yielding their time to their prosecutor.
Kavanaugh looks terrified at the idea of an FBI investigation into him. He must be relieved it's going to be deliberately limited in scope.
I'm guessing the Repugs or Trump have some inkling of what Kavanaugh is scared the FBI will find. Otherwise why the deliberate limitation of scope, as well as of time?
Combine that with the earlier refusal to release documents from his work history, followed by the last minute drop of 42,000 (was it?) docs...
The Repugs know there's stuff about this guy which makes him unappointable.