Like the bumper sticker says, a gun’s only serious enemies are rust and politicians. At least rust has principles. Of course, nothing inspires shameless partisan ambition in politicians like an awful human tragedy. So, in a spasm of deceitful grandstanding, President Obama immediately sprang into the spotlight of last week’s terrible shooting in Oregon to peddle some of the worn, broken and rejected political wares he’s never been able to offload on anyone before. As with every traveling snake oil salesman, Mr. Obama knows how to take advantage of a crowd — even if they are gathered in mourning over the wretched murder of 9 heroic Americans who died — with a gun pointed at their heads — bravely testifying that, indeed, they are Christian and will die Christian. Like Mr. Obama told us, “bitter” Americans cling to their guns and their religion. It really is a mystery why so many people have such deep doubts about whether the guy was even born in America. And how could anyone doubt his Christian faith? “This is a political choice that we make to allow this to happen every few months in America,” Mr. Obama scolded. By “we,” he meant all