I don't either, Monkeyleg. Scary stuff, isn't it?
(That said, I wonder if LBJ was similarly egotistical out of the public eye? No evidence of such, just that I wonder...)
He was. Anecdotes abound, but I can only pull a couple from the memory banks at the moment.
Lyndon was almighty pissed about Jack Kennedy's reputation as a cocksman. He said to one of his aides, (edited for possible underage readers) "What's so great about him? I've had more [strange] by accident than he's ever got!"
One day aboard Air Force One he said to a group of aides,"Churchill's dead...de Gaulle is old...who else is there?" (thumped his chest with both hands) "Now I am king!"