The surprise is that we have yet to have a Jewish-American President. I do not mean Jewish ancestry; I mean someone Jewish by culture or faith. The political talent is strong among Jewish-Americans.
Yeah I think this is even more surprising than the Italian-American thing. 6% of current House members are Jewish (11% among Democrats), and 10% of Senators are (18% among Democrats only, 20% if you count Sanders as a Democrat). Jewish Americans are vastly overrepresented in American politics and have been for some time, yet the closest they've ever gotten to the presidency was Goldwater and Sanders.
I'm sure anti-semitism plays a role in it, but America has also elected and re-elected a black man with a Muslim-sounding name. With that in mind, it's a bit odd that Jewish people still haven't gotten there.
