The following was a clip from a recent presentation, where I discuss the importance of data in improvement (seems obvious, yet not always present).
I also share the unique situation that happened in the 1948 Presidential Election when polling data was biased towards the candidate that lost. As I dug deeper into this story, I don't see where they specifically mention the phone, but there was a problem with the accuracy of the polling. It also mentions that Truman was gaining momentum late in the election, and that wasn't reflected in the polls. Nonetheless, the Chicago Tribune ran their infamous headline that Dewey had won the election, when Truman actually won.
You can learn more about that strange election at https://en.wikipedia.org/wiki/1948_United_States_presidential_election
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