For almost every delivered speech, there exists an undelivered opposite. These "second speeches" provide alternative histories of what could have been if not for schedule changes, changes of heart, or momentous turns of events.

In Undelivered, political speechwriter Jeff Nussbaum presents the most notable speeches the public never heard, from Dwight Eisenhower's apology for a D-Day failure to Richard Nixon's refusal to resign the presidency, and even Hillary Clinton's acceptance for a 2016 victory-the latter never seen until now.

Examining the content of these speeches...