Many of the whites who crowded around Clarence can't stand Bill. And many of the blacks who crowded around Bill can't stand Clarence. She also uses antistrophe, the repetition of a closing word or phrase at the end of successive clauses in both these examples. To complete the 'hat trick', the last paragraph is a good example of chiasmus, the mirror inversion of word order and the opposite of parallelism. Chiasmus' effect comes not from the solid, orderly repetition of words that pound an idea into the minds of readers or listeners, but from the repetition of the same words in reverse order that perks their attention.
Chiasmus lends itself readily to word-play.
It is, however, their ability to render even the silly memorable that makes them such useful tools. Since she can't grow up to be Cato the Elder, she takes out her disappointment on modern orators.