It’s abortion, stupid. For conservative Christians in this election the most important religious issue isn’t gay marriage, stem-cell research or Christmas trees on courthouse lawns. It is abortion (as it has been for at least the past 35 years, since the Supreme Court ruled on Roe v. Wade). When they walk into the voting booth on Tuesday, can they look beyond their fundamental, conscience-driven opposition to abortion as a moral evil? Do they want to? If yes, they may vote for Sen. Barack Obama. If not, they will, despite any reservations, vote for Sen. John McCain.