Miami HeraldBY LESLEY CLARK
lclark@MiamiHerald.com
A coalition of civil rights groups that back gay marriage is using photos of prominent couples like the former Republican governor and his Mexican-born wife, Columba, along with the Cuban-born Martinez and his American-born wife, Kitty, in an advertising campaign marking the 40th anniversary of Loving vs. Virginia, a U.S. Supreme Court decision that gave interracial couples the right to marry.