If the O Force believes it's OK for the government to track citizens by their cell-phone signals, it's not a great leap to believe the same rule would apply to an implanted radio chip. This concern fits within a general disquiet over the Obama administration's incessant drive to expand government power over Americans' private lives. The health care law's provision mandating the purchase of health insurance, for example, is an unprecedented and unconstitutional claim of power under the Commerce Clause, which uses the IRS as its enforcement mechanism. A Congress that believes it can wield this type of power will...