Until the Republican nomination fight is settled, the party’s pandering to the sensibilities of such conservatives in rural areas could prove fatal to its long-term prospects. A Santorum nomination almost guarantees a replay of the Bryan phenomena; no matter how many times he runs, he will prove unlikely to win, even against a vulnerable opponent. Even in losing, his preachy, divisive tone — on contraception, prayer, the separation of church and state — has opened a gap among suburban voters that Obama will no doubt exploit.

The suburbs, with its preponderance of white, middle income independent voters, gave the 2008 election to Obama, and that’s where the next contest will be decided. The countryside will rally to a GOP standard bearer like Romney, albeit somewhat reluctantly, for both economic and social reasons. The battle will then shift to the suburbs, including those urban areas, common in the vast cities of the South and West, that are predominately suburban in form.

Most of the urban core, meanwhile, will vote lockstep for Obama. But the president, as thoroughly a creature of urban tastes and prejudice as to ever sit in the White House, could prove vulnerable in the suburbs, if the Republicans can deliver a message that is palatable to that geography’s denizens.