Explaining White House opposition to a Truth Commission in her article on Leon Panetta in the current New Yorker, Jane Mayer states:
Obama’s political advisers dread any issue that could trigger a culture war and diminish his support among independent voters.
This strikes me as the critical lens for viewing the administration’s approach to abortion, don’t ask/don’t tell, same-sex marriage, stem cell research, faith-based hiring rules, immigration, Guantanamo, you name it…