After her speech at the Republican National Convention on Wednesday night, some suggested Condoleezza Rice could make good presidential material. Some factors might not be in her favor: she is a woman (we have elected a black president but not a woman) and she has an interesting background that includes being a professor, provost, National Security Advisor, and Secretary of State (not exactly a traditional path to the White House). However, I wondered about another factor: could a single person become President?

While more Americans are living alone and marriage might be pursued by some people more than others, Americans seem to prefer national leaders who are married and have families. Many might ask: how could a single president understand the plight of families? If the single candidate didn’t have children, what would they know about raising children?

Since at least the late 1930s, Gallup has asked about what kind of president Americans would be willing to vote for. A few of the results:

The results are based on a June 7-10 Gallup poll, updating a question Gallup first asked in 1937 in reference to a female, Jewish, or Catholic candidate and has asked periodically since then, with additional candidate characteristics added to the list. The question has taken on added relevance in recent years as a more diverse group of candidates has run for president. This year, Mitt Romney is poised to become the first Mormon to win a major-party presidential nomination. However, Americans’ willingness to vote for a Mormon has changed little in 45 years.

Notwithstanding the Mormon trend, Gallup’s history on this question shows growing acceptance for all other types of candidates over time. That includes atheists, whose acceptability as candidates surpassed 50% for the first time last summer but have typically ranked at the bottom of the list whenever the question has been asked.

In 1937, less than half of Americans said they would vote for a Jewish or female presidential candidate; now 90% or more would. The same applies to voting for a black candidate compared with 1958. Over time, Americans’ acceptance of blacks and women as candidates has increased the most…

Americans of all political party affiliations are nearly unanimous in saying they would vote for a black, female, Catholic, Hispanic, or Jewish president. Democrats are significantly more likely than Republicans to say they would vote for a presidential candidate who is gay, Muslim, or an atheist. Republicans, in turn, are more likely to say they would vote for a Mormon.

As far as this page suggests, Gallup has not asked about whether candidates should be married or have a family.

It would be interesting to see this play out…