Ivanka is, in the absence of Melania (who is currently residing in New York City), the de facto First Lady. She has no official political duties, and no political implications as to her effect on Trump Administration are evident.
This is actually an excellent sounding board for President Trump to have in regards knowing in depth what the liberal mindset may be, and while he respects his daughter and son-in-law, he does not demand unwavering fealty from them.
Sorry...but the no "official" political duties only makes Ivanka's lobbying of Congress even more egregious.