Time itself is pro-gay marriage

In the aftermath of the Iowa Supreme Court ruling that same-sex marriage is protected under the state’s constitution, Nate Silver at FiveThirtyEight.com has laid out how public opinion in the US is shifting steadily towards gay marriage, and he makes predictions about when each US state will have a pro-gay marriage majority:

Marriage bans, however, are losing ground at a rate of slightly less than 2 points per year. So, for example, we’d project that a state in which a marriage ban passed with 60 percent of the vote last year would only have 58 percent of its voters approve the ban this year.

All of the other variables that I looked at — race, education levels, party registration, etc. — either did not appear to matter at all, or became redundant once we accounted for religiosity. Nor does it appear to make a significant difference whether the ban affected marriage only, or both marriage and civil unions.

So what does this mean for Iowa? The state has roughly average levels of religiosity, including a fair number of white evangelicals, and the model predicts that if Iowans voted on a marriage ban today, it would pass with 56.0 percent of the vote. By 2012, however, the model projects a toss-up: 50.4 percent of Iowans voting to approve the ban, and 49.6 percent opposed. In 2013 and all subsequent years, the model thinks the marriage ban would fail.

Elsewhere, there’s more from Daily Kos and Polswatch.