An Indiana advocacy group is planning its next step in the fight against a ban on same-sex marriage.The Indiana General Assembly this week approved a constitutional amendment banning same-sex marriage and civil unions. It must pass the legislature again in two years and then be approved in a public vote before becoming official.Indiana Equality President Rick Sutton says his organization is considering various strategies to stop the amendment. He says several people have called for a campaign against lawmakers who supported the measure so they won't be in office when it comes up again in the 2013 session."I don't know that that's the wise thing to do or not," he says. "We have to survey our members and see what they want to do and plot our strategy politically. But it could include individual action against individual members and it must include a public education campaign. We have to do that."The amendment passed the Indiana Senate with a 40-10 vote and the House with a 70-26 vote.