**SNIP** Requiring employees to shoulder more of the cost burden may undermine public support for Obamacare just as Congress, now firmly under Republican control, considers new ways to gut the law. The tax takes effect in 2018, and employers are already laying the groundwork to make sure they don’t have to pay the 40 percent surcharge on health-insurance spending that exceeds $27,500 for a family or $10,200 for an individual. Once envisioned as a tool to slow the nation’s growing health-care tab, the tax has in practice meant higher out-of-pocket health- care costs for workers. “I don’t think there’s any...