While he was Maryland’s chief federal prosecutor, Deputy Attorney General Rod Rosenstein’s office failed to interview the undercover informant in the FBI’s Russian nuclear bribery case before it filed criminal charges in the case in 2014, officials told The Hill. And the prosecutors did not let a grand jury hear from the paid informant before it handed up an indictment portraying him as a “victim” of the Russian corruption scheme, or fully review his extensive trove of documents until months later, the officials confirmed. The decisions backfired after prosecutors conducted more extensive debriefings of William Campbell in 2015, learning much...