Failure to write a concession speech is what sealed Mitt Romney's fate:
(YouTube video: "Election Night" episode, The West Wing)
Sam Seaborn: You wrote a concession?
Toby Ziegler: Of course I wrote a concession. You want to tempt the wrath of the whatever from high atop the thing?
Sam Seaborn: No.
Toby Ziegler: Then go outside, turn around three times and spit. What the hell's the matter with you?