U.S. Senators Claire McCaskill and Jon Tester are probing the transition of federal security clearance background checks to a newly created agency— raising concerns about whether there is a concrete plan for the creation, operation and oversight of the new bureau. “We are concerned that this transition is moving forward without firm plans in place for the transition, operation and oversight of the new bureau,” the Senators wrote in the letter. “We also want to ensure that the [National Background Investigations Bureau] will not simply be a new name for the [Federal Investigative Service]. Instead, it is critical that you make significant structural changes to improve the integrity, management and oversight of the security clearance process. We also remain concerned about the timeliness of current and pending investigations and want to ensure that plans are in place to address the significant backlog of background investigations during this transition, while maintaining the integrity of the investigation process.”