The Republicans (and some Democrats) filibustered LBJ’s nomination of Abe Fortas to be Chief Justice in 1968. Because of that, Nixon had the opportunity to nominate Warren Burger.
(This is the precedent for the principle that you don’t confirm Supreme Court nominees in an election year.)
Quick quiz: Who was LBJ’s nominee to replace Fortas as an Associate Justice?
The irony is that Fortas might have been more conservative than Burger...I guess it’s one of those things we can only speculate about....
Homer Thornberry of Texas?