The paragraph was about her upbringing and values. That should be genuine not a copy of someone elses.
It is far more likely than not, that the two sentences being parsed to hell & back, today, were not copies of someone else's writing.
The concepts in those sentences are such common place comments, that the cliches under-discussion have been applied literally thousands of times--maybe millions of times--in very, very similar contexts, in public discourse. Just how many distinct ways can anyone describe the instilling of values in a family. It is virtually impossible to actually do so in a unique manner. But one does not need to copy anyone else, to end up unwittingly copying a great many "anyone else's.
Let us not lose sight of the fact that Mrs. Trump delivered her address--which had a great deal more to it than those two over analyzed sentences--with warmth, sincerity & an effectiveness that neither Mrs. Obama or Mrs. Clinton could ever--ever in their lives--hope to match.
Do not lose sight of the fact that this speech was a great asset to the campaign. It should be played again and again in the campaign.