Everyone copies everyone. If you copy enough people, you’re erudite and eclectic. If you only copy one, you’re “plagiarizing”. Who really gives a flying f@#$%? It was a speech, not a novel or a dissertation.
Right. Most phrases are public domain.
I must have heard this a hundred times before Michelle O ever said it:
“... you work hard for what you want in life; that your word is your bond and you do what you say you’re going to do ...”