"Rosenberg served as Chief of Staff to the Director of the FBI from 2013 to 2015. In this role,
he worked closely with Director James Comey and other senior FBI officials on counterterrorism, intelligence, cyber and criminal investigative issues, including with international, federal, state and local law enforcement partners. . .Throughout his distinguished career in law enforcement and public service,
Chuck has earned the trust and the praise of his colleagues at every level,” said former Attorney General Loretta Lynch. . .
On August 2017, Rosenberg found himself at odds with the Trump administration over the President's remarks encouraging the police to rough up suspects.[7] His internal memo to the DEA workforce gained public attention for Rosenberg's repudiation of Trump's remarks. In it, Rosenberg wrote "The President, in remarks delivered yesterday in New York, condoned police misconduct regarding the treatment of individuals placed under arrest by law enforcement... I write to offer a strong reaffirmation of the operating principles to which we, as law enforcement professionals, adhere. I write because we have an obligation to speak out when something is wrong. That’s what law enforcement officers do. That’s what you do. We fix stuff. At least, we try."[8] The Washington Post Editorial Board, in a piece titled "A divided nation gets moral guidance - but not from Trump" wrote "His letter was important not as a rebuke to the president but as a model of leadership and courage in reaffirming democratic values.". . .
On September 26, 2017, it was announced that Rosenberg, dismayed by the Trump administration, was stepping down.[10][11] His resignation became effective October 1, 2017.[12][13] It was announced on October 3, 2017 that Robert W. Patterson, who had been serving as the DEA's Principal Deputy Administrator since November 2016,[14] had succeeded Rosenberg as Acting Administrator for the DEA.[12]. . .
On November 13, 2017, Rosenberg initiated his role as an MSNBC News contributor with an interview on The Rachel Maddow Show.":
Chuck Rosenberg