Of Donald Trump’s most prominent allies in the presidential campaign, Jeff Sessions is the last one standing. Newt Gingrich is an outside adviser to Trump and occasional critic. Chris Christie works full-time as governor of New Jersey. Rudy Giuliani didn’t get the position he wanted—secretary of state—and turned down several he didn’t want.

Sessions, as Trump’s choice for attorney general, has the job of draining the swamp at the Department of Justice and making DoJ great again. It’s going to be a grueling job with many facets. The good news is that Sessions, a former U.S. attorney and Alabama attorney general before he was elected to the Senate in 1996, is familiar with all of them.