The metaphor in the speech is "texting while driving is a blindfold".
A metaphor is known to be a kind of figure of speech where a given word or phrase is said to often denote one kind of object or idea that is said to be used in place of another. It is often done to show likeness between them.
Therefore, in the case above, The metaphor in the speech is "texting while driving is a blindfold".
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