Scores of senior career diplomats are resigning from the State Department effective at noon on Monday after receiving instructions to do so from President-elect Donald Trump’s aides, said three U.S. officials familiar with the matter. The forced departures, aimed at establishing a decisive break from the Biden administration, will see an exodus of decorated veterans of the Foreign Service, including John Bass, the undersecretary for management and acting under secretary for political affairs, and Geoff Pyatt, the assistant secretary for energy resources, said the officials, who like others spoke on the condition of anonymity to discuss personnel decisions ahead of...