This isn't an accident anymore. I have the sense that the Trump family spent today clearing the speeches of any language that came from Democrats, but plagiarism is not a problem for them. Not a problem at all.
— The Daily Show (@TheDailyShow) July 20, 2016
When I was watching the speech, I remarked that these lines (one of the more memorable) sounded like they came from Paul Ryan, but no. It's F.H. Buckley.
It's true, you know. The Trumps take other people's work and slap their brand on it. Whether it's wine, or steaks, or speeches.
Update:
Apparently it was just "recycled."
@Karoli PER @HeerJeet "The AmCon writer also wrote Trump Jr.'s speech. So recycling rather than plagiarism"
— ((( IL Steve ))) (@21law) July 20, 2016
I’m morally confused about an author quoting himself, without attribution, in a speech delivered by someone else. @JamesFallows
— Oliver Griswold (@originalgriz) July 20, 2016