Robert P. Jones doesn’t necessarily think so, at least not versus Obama:
Beyond the religious identity challenge, both Obama and Romney also face a religious identification challenge with the public. Specifically, more Americans than not say that each of these leader’s religious beliefs are different from their own. Romney of course faces a hurdle here that Obama does not: 72 percent of Americans report that Mormons have religious beliefs that are somewhat or very different from their own. But any advantage that might accrue to Obama because of his more familiar Christian faith is not evident in the numbers. The number of Americans saying Obama has religious beliefs that are different from their own stands at 48 percent, a number that is slightly higher than the same measure for Mitt Romney (43 percent).