The marriage gap far outpaces the gender gap in politics -- does undermining marriage end up serving partisan purposes?

As pollster John Zogby notes in a Forbes.com column, the "marriage gap" between Democrats and Republicans is "even more dramatic" than the so-called gender gap:

In an analysis provide [sic] by my colleagues at Gallup after the 2008 election, all married voters supported Senator John McCain over his Senate counterpart Barack Obama by a 12 point margin--56% to 44%. Single voters favored Obama overwhelmingly by 30 points--65% to 35%. . . .

We see every indication thus far that married voters will turn out and we see pretty much the same patterns as in 2008 in our 2012 polling. Thus, [Mitt] Romney leads Obama among married voters by 13 points--50% to 37%--which is about the same as McCain's margin in 2008. But Obama's 18 point lead among all single voters--52% to 34%--is far short of his performance four years ago.

If these numbers hold up in November, it will be good news for Republicans. But if the marriage gap persists, then it will be in the Democratic Party's long-term interests to undermine the institution of marriage. -- James Taranto in the Wall Street Journal