India, Aug. 18 -- For most White House aides, being near the US president is part of the job. For Natalie Harp, that proximity has become the story itself. The relatively low-profile Trump aide has suddenly drawn widespread attention after she was among only a few people allowed to accompany President Donald Trump during a secretive security operation in Turkey.

The episode has now moved beyond questions about presidential security.

Democratic Senator Jon Ossoff has publicly questioned Trump's decision to travel with Harp during the operation, bringing renewed attention to her unusually close access to the president. Harp has worked around Trump for years and has developed a reputation as one of his most trusted aides, but recent report...