Complex sentence: In December 2016, the Donald Trump administration announced that Crowley would be appointed senior director of strategic communications for the National Security Council but she resigned the post the following month following revelations of repeated plagiarism in her writings throughout her academic and professional career.
Split into simpler sentences: In December 2016, the Donald Trump administration announced that Crowley would be appointed senior director of strategic communications for the National Security Council. However, she ceded the post the following month following revelations of repeated plagiarism in her writings during her academic and professional career.