Republican lawmakers around the country are adding criminal background checks or licensing requirements for workers hired to help people enroll in health insurance under the Affordable Care Act, taking aim at perceived security risks involving customers' personal information. More than a dozen GOP-controlled states have passed legislation tightening requirements for the enrollment counselors, and bills in other states are pending. While the federal government does not require criminal background checks for navigators, states can set their own rules. Arizona Gov. Jan Brewer last month signed a bill requiring licensing and background checks for navigators who help people buy health insurance on the federal marketplace.