Iowa's Supreme Court legalised gay marriage today in a unanimous and emphatic decision that makes Iowa the third state - and the first in the heartland of the United States - to allow same-sex couples to wed. In its decision, the high court upheld a lower court's ruling that found a state law restricting marriage to between a man and woman violated Iowa's constitution. "We are firmly convinced the exclusion of gay and lesbian people from the institution of civil marriage does not substantially further any important governmental objective," the Supreme Court wrote in its decision. "The Legislature has excluded a historically disfavoured class of persons from a supremely important civil institution without a constitutionally sufficient justification." This ruling is symbolic because Iowa it was that first endorsed Barack Obama, who against all expectations at the time of Iowa's endorsement went on to win the Democratic nomination and eventually the Presidency.