The grown-up Trump kids were also working at the White House and appearing in media and in political meetings of all kinds, on behalf of the Trump administration. As soon as that happens, the familial relationship is irrelevant to the coverage and disclosure requirements. Any shield of “oh, not family members” is subsumed wholly by the public interest in open government and a free press.

If family members fuck off out of politics and keep their mouths shut, they’d mostly get left alone, except for the most conspiratorial weirdos on the right.