"I cannot imagine a more challenging environment in which to be the deputy attorney general than what we have now," said Jason Weinstein, a former Justice Department official who worked with Rosenstein during the administrations of Bush and Obama. "And I cannot imagine a better person for the job at this time than Rod. He is not political at all. In every decision he makes - and I've seen him make some very difficult ones - the only question he really cares about is what is right and what is just."