The Family Leader, an Iowa religious right group that has been active in GOP caucuses of that state, backtracked on a pledge the group released last week that asked candidates to vow to oppose pornography and same-sex marriage. The pledge contained a controversial statement about slavery, and over the weekend, the Family Leader removed that reference. Rep. Michele Bachmann — the first signer of the pledge — said that she wasn’t signing off on the preamble that contained the slavery reference, only the vows themselves.