I recall that 0bama plagiarized Devel Patrick’s “just words” speech, word for word, and another Devel Patrick speech as well. MLK plagiarized his doctoral thesis, and his “I have a dream” speech. Alex Haley plagiarized another author’s work, including it in his book, Roots. Biden has plagiarized speeches made by others.
So, you see, this is very common, but the media is focused now on derailing Trump, so they are in full scale attack mode.
Chris Cuomo actually, to his credit, said that Obama plagiarized that speech.