Donald Trump is the President of the United States and he can have  anyone he wants for advice and counsel - including his daughter.   Ivanka takes no government salary and her father values her opinions and counsel.   Remember John F Kennedy?  He made his brother Robert Kennedy who had never tried or prosecuted a single criminal or civil case, the DoJ AG and his brother in law Sargent Shriver his Press Secretary who had no journalism experience and they were both on government salaries.   Mrs Clinton when she was The First Lady in 1992, publicly declared herself the co-president and demanded a chair at the cabinet meetings.    She demanded that she be the official head of the secret push for a single payer health bill  outside of Congress  which turned out to be a failed disaster - like everything else she is involved in.