Liz Cheney was against both DOMA and the marriage Amendment and supports gay marriage, Mitt Romney has always been radically pro-homosexual agenda. Governor Palin was pro-DOMA and pro Constitutional Amendment.
Palin--"Like the majority of Americans, I support the Defense of Marriage Act and find it appalling that the Obama administration decided not to defend this federal law which was enacted with broad bipartisan support and signed into law by a Democrat president."
Palin--Breaking ranks from the top of her ticket, the Alaska governor said she had voted in 1998 for a state amendment banning same-sex marriage and hoped to see a federal ban on such unions. She said she believed traditional marriage is the foundation for strong families.
McCain was more libertarian--"McCain, an Arizona senator, is supporting a ballot initiative in his state this year that would ban gay marriage. But he has consistently and forcefully opposed a federal marriage amendment, saying it would usurp states' authority on such matters."
Romney--"For some voters it might be enough for me to simply match my opponent’s record in this area. But I believe we can and must do better. If we are to achieve the goals we share, we must make equality for gays and lesbians a mainstream concern. My opponent cannot do this. I can and will."
"One issue I want to clarify concerns President Clinton’s “don’t ask, don’t tell, don’t pursue” military policy. I believe that the Clinton compromise was a step in the right direction. I am also convinced that it is the first of a number of steps that will ultimately lead to gays and lesbians being able to serve openly and honestly in our nation’s military. That goal will only be reached when preventing discrimination against gays and lesbians is a mainstream concern, which is a goal we share."
Palin is anti-gay marriage, nobody is arguing that. But she NEVER talks about it unless forced to answer a direct question, she wastes no political capital on the issue. You look at 100 random Google stories on Palin, not one of them will be about protecting marriage. Again, she is no Obama or Romney, but she is not a Santorum or Bachmann either.
Ever since the 2008 election she has been ignoring the issue as the gay lobby made giant strides in politics and culture.