"A 1998 law, the VRA allows him to install for a limited time, any Senate-confirmed official or any Department of Justice employee who has attained a certain level of seniority and has been on the job for 90 days. This means he has about 3,000 lawyers to choose from, but the vast majority are career employees who would not serve his purposes. Even his political appointees aren’t likely to be more pliable than Sessions and Rosenstein. But he needs only one. With a little planning he could install a true believer to a political position at DOJ—as a sleeper agent—and then elevate him or her to attorney general in 90 days. Under the VRA, such a person could serve as acting attorney general for only 210 days—plus another 210 days if Trump eventually gets around to nominating someone—but that’s plenty of time to engineer Mueller’s firing or otherwise limit his work."