On its surface, the presidential election in El Salvador on Sunday shouldn’t matter to the average American. But this is no ordinary election. Experts say an expected win by the current ruling party, the FMLN, will turn El Salvador into a haven for gangs and narco-traffickers with dire consequences for the United States. Stunning recent evidence and leaked government documents suggest the country’s current President and ruling party for years have been secretly backed by the MS-13 gang, which is considered by many as America’s most brutal enterprise because of its reputation for using machetes to hack people to death....