The evidence that is least relevant to the speaker’s argument is:
And finally, our neighboring town of Westmont also named its library by a vote.
While this statement provides an example of another town using a voting process, it does not directly support the benefits or fairness of the voting process itself as clearly as the other pieces of evidence. The other statements highlight the perceived fairness, efficiency, and approval rates associated with voting, which are more directly relevant to the speaker's argument for a public vote in naming the new library.