Nearly the entire Iowa House Republican caucus is co-sponsoring House Joint Resolution 6, a constitutional amendment that would ban not only same-sex marriages, but also civil unions and domestic partnerships for same-sex couples in Iowa. The bill was introduced today, although the text of HJR 6 is not yet available on the legislature’s official website.

Fifty-six of the 60 Republicans in the Iowa House are listed as sponsors of the bill. No Democrats have signed onto the bill as a sponsor.

Rep. Dwayne Alons, R-Hull, is leading the resolution and said he offered it to all Republicans to sign as sponsors as well as some Democrats.   Democrats and the four Republicans declined to sign this version, he said.

The four Republicans who declined to sign are Reps Steve Lukan of New Vienna, Peter Cownie of West Des Moines, Scott Raecker of Urbandale and David Tjepkes of Gowrie.

Cownie told the Des Moines Register’s Jason Clayworth that he plans to vote for the bill on the House floor, and I assume Lukan, Raecker and Tjepkes will too.

Once upon a time, Republicans pretended they didn’t mean to write discrimination into the state constitution, they only wanted to protect a traditional definition of marriage. I’m “shocked, shocked” to learn that Republicans want not only to exclude some couples from civil marriage, but also to foreclose any legal recognition of or protection for same-sex relationships.

That position clearly does not reflect popular opinion in Iowa. Even before the Varnum v Brien ruling, a Hawkeye poll conducted in March 2009 found that 26 percent of Iowans supported same-sex marriage rights and another 28 percent supported civil unions, while just 37 percent opposed any legal recognition of same-sex relationships and 9 percent did not know. An Iowa poll this month by Public Policy Polling did not ask about civil unions but found that 41 percent of respondents supported same-sex marriage rights. In the same poll, 52 percent of respondents said same-sex marriage should not be legal, but presumably a significant portion of that group would back civil unions or some form of legal protection.

Senate Majority Leader Mike Gronstal has said he will block any marriage amendment from coming to a vote in the upper chamber, so Iowa House approval is probably the end of the road for House Joint Resolution 6 this session. If the GOP wins an Iowa Senate majority in 2012, this kind of amendment would likely pass in 2013. Republicans would have to hold both chambers of the legislature and pass the bill again in 2015 or 2016 in order to get a marriage amendment on the November 2016 ballot. A simple majority of yes votes would be needed to approve the amendment.

One Iowa is urging supporters of marriage equality to contact their state representatives and senators immediately. It might be worth mentioning that New Hampshire Republicans, who control both chambers of the legislature, have decided not to try to repeal same-sex marriage rights this year. The GOP leader of the New Hampshire House, D.J. Bettencourt, has said “social issues must take a backseat” to legislation focused on jobs and the economy.

UPDATE: Alons showed the logical reasoning skills that make him one of Iowa’s most clueless legislators when speaking to the Des Moines Register yesterday:

“I think the biggest issue is that if that (a same-sex marriage ban) is carried forward, and then Iowa does civil unions and recognizes that as a substitute status, then, from what I’ve seen in other states,” people would come to consider same-sex civil unions as equal to marriage, Alons said.