She had us in the first half.

I think the point here is that he was saying that people were just making up facts but they were, in fact, true. Basically yelling “Fake News” to deflect from having to admit his guilt.

Context leads me to believe she was referring to Jefferson

Ivanka was comparing Jefferson’s situation to her father’s not understanding she was implying his guilt once you know all the context of the original quote. I think it’s more of a clown on her than anything to do with the president.

What makes it even more bonkers is that Donald has probably fucked his daughter at least once.

To be fair, she’s a lot hotter than her Mom was.

Perhaps Donald is not the biological father.
This ain't the first time the thought has crossed my mind.

Nah, she just had early access to surgery and a parent who values physical trophies.

When Hitler said smoking was bad, it doesn't make the rest of what he said any more valid, and given the fact that there are way more wholesome advocates against smoking, it would appear as a weird choice to quote Hitler on this anyway. No bad person in history has probably said anything wise or important to know that some way more decent person hasn't said, too. And as scatmandingo pointed out already, had Ivanka known the historic context of Jefferson's letter, she would probably not have used it. Or, well, maybe she would've done so anyway. Truth and facts are not exactly part of her family traditions.