Thomas Dewey was “the little man on the wedding cake” who lost to FDR in 1944 and to Truman in 1948. If Dewey had won in 1948, Earl Warren would have become Vice President. If Dewey had then been re-elected in 1952, we wouldn’t have had a Warren Court.
On the other hand, if Dewey had been re-elected in 1952, Vice President Warren might have been elected president in 1956. Then, instead of the Warren Court, we might have had the Abt Court or the Crockett Court.