Last week’s column asserting that the president is unelectable has triggered strong responses. Democrats, in particular, seem to think my judgment is premature. It strikes them as ridiculous that anyone could make such a “bold prediction” so far in advance of the 2012 election. Hey, that’s what we do, as seasoned political professionals, as pollsters. But I must stress that I am not so much making a personal prediction as drawing an informed conclusion based on all the numbers available. I do this in each election cycle for other candidates, and it’s time to make the call on President Obama....