Hillary Clinton's personal aide, Huma Abedin, has announced she is separating from her husband, disgraced former politician Anthony Weiner.
Ms Abedin's announcement comes after a report emerged that he had allegedly exchanged sexual photos with a woman.
He appeared to have sent a photo of himself in his underpants with his toddler son nearby.
The former congressman resigned in 2011 after sending explicit photos to women by text message.
"After long and painful consideration and work on my marriage, I have made the decision to separate from my husband," Ms Abedin said in a statement.
"Anthony and I remain devoted to doing what is best for our son, who is the light of our life. During this difficult time, I ask for respect for our privacy."
She is one of Mrs Clinton's most trusted advisers and Republican Donald Trump said the story demonstrated a lack of judgement on Mrs Clinton's part.
"I only worry for the country in that Hillary Clinton was careless and negligent in allowing Weiner to have such close proximity to highly classified information."