It's also quite the turnaround - and maybe one with interesting implications for the Congressional elections - from 2010 and also (if we remember NY-9 and so on) 2011.
FWIW, I'm pretty sure that that NY-9 was less about Catholics turning against the Democratic Party and more about the Hasidic vote. It's not something that can really be extended to a whole lot of other districts, though I'm sure it's a help for Nan Hayworth.
O.K, let's be less cryptic. Though as this is an insomnia post, only slightly. American Catholics do not actually vote 'as Catholics', for the most part. Haven't done for ages. But it happens that Catholicism is a shared characteristic of large parts of that traditionally Democratic part of the electorate that never really went head over heels for Obama.
Of course as regards NY-9
specifically... as some idiot pointed out at the time it isn't actually Tel Aviv West (or Bnei Brak West either, for that matter), despite a certain tendency to assume that it must be. Suffice to say that all kinds of things were going on and all at the same time and that this was necessary for the district to be lost... but also that the district's (actually quite substantial) Catholic population mostly voted in the same general direction as the guys with the beards and the black hats.