Al Smith (D).
In 1928, northern Blacks and Jews, both of which had been heavily Republican in 1920 and 1924, joined Catholics in voting for Al Smith.
The main difference between 1928 and 1984 is that, by 1984, most white Catholics had forgotten that they were minorities.
Jews voted for Wilson and Davis well before that. Indeed, Jews might just well be the oldest still voting-D bloc there is.
I think Jews were more Republican than Catholics prior to that era, and they supported TR. That was when American Jews were primarily of German origin.
Poll
