While the leading Republican presidential candidates agree on many moral questions — from the divine foundation of ethics to the rejection of reproductive rights and marriage equality — new research suggests that the candidates differ when it comes to the focus their moral concerns. According to the University of Southern California-run web site Election 2012, USC psychology professor Jesse Graham surveyed 35,000 self-identified conservatives and liberals to gauge their varying moral values (and by extension, those of their preferred candidates). What did he find? Social conservatives, like Rick Santorum, care more about loyalty to family and nation, respect for tradition and authorities, and maintaining physical and spiritual purity. But libertarians, like Ron Paul, typically don’t care about these group-focused concerns. Their central moral value…