In an interview with an Associated Press, Gronstal said he knows his stand against letting voters decide whether to amend the Iowa Constitution to ban gay marriage could hurt him with some constituents, but he was willing to take the risk.
"I'm not going to put discrimination into the state's constitution," he said.
"My read is the public at large is changing pretty significantly," Gronstal said. "It used to be that if you're under the age of 30, two-thirds of you were probably fine with gay marriage and if you were over 50, two-thirds of you were against it."
But now, Gronstal thinks "more like two-thirds of the people under 40 are fine with it."
So, unless he changes opinion or he is not re-elected in 2012, there won't be any ban and, moreover, the law to legalize gay marriage will be proposed and apparently as soon as possible starting from 2013.