Marriage equality is here to stay in Iowa, if the latest statewide poll for the Des Moines Register is any guide:

Forty-one percent say they would vote for a [constitutional amendment to] ban [same-sex marriage], and 40 percent say they would vote to continue gay marriage. The rest either would not vote or say they are not sure. […]

The overwhelming majority of Iowans – 92 percent – say gay marriage has brought no real change to their lives. […]

The poll shows that 26 percent of Iowans favor April’s unanimous court ruling legalizing same-sex marriage, 43 percent oppose it and 31 percent don’t care much or are not sure.

Despite the 43 percent opposition to the ruling, 61 percent of Iowans say other issues will influence their decision on whether to vote to retain Iowa Supreme Court justices in the 2010 elections.

Selzer and Co. surveyed 803 Iowans between September 14 and 16, and the poll has a margin of error of 3.5 percent.

I recommend clicking through to view the chart showing the breakdown by party affiliation on this issue. Among independents, only 44 percent either oppose or strongly oppose the Iowa Supreme Court’s decision that cleared the way for marriage equality, while 32 percent “don’t care much” and 22 percent either favor or strongly favor it.

Many Iowa Republicans are convinced that they can gain traction in next year’s legislative elections by bashing statehouse Democrats who oppose a constitutional amendment to ban same-sex marriage. However, the Republican candidate fell just short in the recent special election in Iowa House district 90, even though the National Organization for Marriage poured nearly $90,000 into ads supporting the Republican because of the marriage issue. (The NOM plans to be involved in next year’s Iowa elections as well.)

A poll commissioned by The Iowa Republican blog in July indicated that two-thirds of Iowans wanted a public vote on same-sex marriage, but that poll framed the question as follows: “The Iowa Supreme Court has ruled gay marriages can legally be conducted in the state. Whether you agree or disagree with the decision, do you think Iowa voters should have the chance to vote on a traditional marriage amendment to the constitution or is the issue best decided by the Supreme Court?” Todd Dorman was right to point out that it would have been more enlightening to ask respondents how they would vote on a marriage amendment.

The Register’s poll could strengthen the hand of Republicans like Doug Gross, who have been saying all year that the GOP should downplay divisive social issues and focus on the economy in next year’s elections. On the other hand, 51 percent of Republicans surveyed by Selzer and Co strongly oppose the Supreme Court decision, while 11 percent just oppose the decision, 27 percent don’t care much and only 10 percent either favor or strongly favor it. Gubernatorial candidate Bob Vander Plaats promises to issue an executive order on day one halting same-sex marriages if elected, and he will find plenty of support among the Republican rank and file.

I’ve been telling my friends, “Don’t worry, be happy,” since the Iowa Supreme Court announced its Varnum v Brien decision in April. I figured that with each passing year, more Iowans would understand that no one is harmed and thousands are helped by granting gays and lesbians civil marriage rights. I also felt that Republicans would not be able to win many races on this issue in 2010, let alone in subsequent years. Still, I wouldn’t have been surprised to see a poll this year showing majority support for overturning the Supreme Court ruling. Learning that a constitutional amendment on marriage lacks majority support even now makes me that much more optimistic. (UPDATE: Forgot to add that Iowa has a lengthy constitutional amendment process.)

Now it’s imperative to defeat Proposition 1 in Maine this November. Please help if you can.