Denise Cheung, the head of the criminal division in the U.S. Attorney’s Office for Washington, D.C., has abruptly resigned rather than comply with the directives of the newly Trump-appointed leadership. “When I started as an AUSA, I took an oath of office to support and defend the Constitution, and I have executed this duty faithfully during my tenure, which has spanned through numerous Administrations,” Cheung wrote in her email obtained by CNN. “I know that all of the AUSAs in the office continue to honor their oaths on a daily basis, just as I know that you have always conducted...