Instructions: In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
Input: The Assistant to the President for National Security Affairs ( APNSA ) , commonly referred to as the National Security Advisor ( NSA ) or at times informally termed the NSC Advisor , is a senior aide in the Executive Office of the President , based at the West Wing of the White House , who serves as the chief in-house advisor to the President of the United States on national security issues .
Output:
The National Security Advisor , officially known as the Assistant to the President for National Security Affairs , serves as the top advisor to the President of the United States on national security issues .