The worthless, useless, pampered, Princelings of the palace.
Javanka is(are) the main reason that Bannon got kicked out of Trump's inner circle, even though running on Bannon's worldview, not Javanka's is what got Trump elected. I don't defend all of Bannon's actions afterwards, but I can well understand his bitterness and sense of betrayal over being pushed out of his role as senior advisor by two flaky, spoiled liberals.
As to the "blood is thicker than water" excuse we keep hearing from Javanka's defenders around here, Ronald Reagan loved his liberal son and daughter, but he had the sense not to make them his senior advisors.