Support For Same-Sex Marriage Increasing In Iowa | A new Public Policy Polling survey finds that Iowa is becoming increasingly favorable to same-sex marriage. Forty-six percent think marriage equality should be legal, while 45 percent would outlaw it. “When civil unions are included as an alternative, giving gay couples the same rights as marriage, 40 percent still prefer full marriage equality, 30 percent favor civil unions, and only 29 percent think there should be no recognition of these relationships at all.” Asked the same question in April, the breakdown was 35-29-33. In the mid 1990s, just 24 percent of Iowans supported same-sex marriage. By 2010, 44 percent did.