On a side you have the republican House which approved the resolution, and on the other side the democratic Senate which rejected it considering that it was discriminatory.
Desmoinesregister reports the hourlong rally drew an enthusiastic crowd from throughout the state decked out in red shirts and jackets, the color used by LUV Iowa, a group backing the amendment. Some toted signs, such as "Man + Woman = Marriage" and "God is not a Liar." They shouted, "Amen," in agreement with the event's speakers.
A handful of protesters stood about 40 yards away with signs bearing messages such as "Support all marriage" and "An injustice anywhere is a threat to justice everywhere." Less than 30 minutes later, about 60 supporters of gay marriage, many in blue garb, buttonholed House and Senate members inside the Capitol rotunda, asking them to respect the rights of all Iowans.