Walmart has won the latest skirmish with a shareholder, which also happens to be one of the oldest churches in the nation, New York's Trinity Church. On Tuesday, the U.S. Court of Appeals reversed a previous ruling that would have required Walmart to let its shareholders vote on a proposal for tighter oversight of firearm sales. The church did not like that Walmart sells guns with high-capacity magazines of the sort used in mass killings. It wanted to require Walmart board approval for selling such weapons.