“These accusations are completely and demonstrably false,” said State Department Principal Deputy Spokesperson Vedant Patel.
The Prime Minister's son shared an article from alt-right website Breitbart, in which it alleges that the US is funding protests to topple Netanyahu.
Yair Netanyahu has been particularly critical of the judicial reform protests that have swept Israel in the last few months.
The Prime Minister's son compared Tel Aviv to Ramallah, and said that the protesters had become "twins with their Palestinian barbarian brothers."