Here’s a story from Barack Obama’s 2008 Presidential campaign which I meant to blog when I read it.   From an article by Mark Danner:

Everything else they [election commentators and bloggers] would never see. It existed only for the several thousand cheering people in Vernon Park on that bright morning in Germantown. They would never see, for instance, Obama’s riff on sweet potato pie. It came as he told a story about his campaigning “the other day in a little town in Ohio, with the governor there,” about how he and the governor suddenly felt hungry and “decided we’d stop right there and get some pie.” Now here began a little gem of a story, which had at its center the diner employees who wanted to take a picture with Obama, not least because, as they told him, their boss was a die-hard Republican and “they wanted to tweak him a little with that picture.” All this was heading toward a carefully choreographed finale, where the owner appeared personally with the pie for candidate and governor and Obama looked at the pie and looked at the pie-carrying die-hard Republican owner and “then I said to him”—perfectly elongated pause—“How’s business?”
This brought on great gales of laughter from the crowd. For the joke turned on a point already precisely made: How can even the most die-hard of die-hard Republicans, if he is thinking of his self-interest, how can he vote Republican this year? “If you beat your head against the wall,” Obama demanded of that faraway Republican with his pie, to a blizzard of “oh yeahs!” and “you got that right!” from the crowd, “and it hurts and hurts, how can you keep doing it?” But it was those two words, ”How’s business?”—that casual greeting thrown at the Republican diner owner that showed that there simply could be no other choice this year—that showed the case proved, wrapped up, unassailable.

And yet what struck me in this little model of political art was a tiny riff the candidate effortlessly worked into it from his banter with the crowd. When Obama launched into his story with “Because I love pie,” a woman out in that sea of cheering, laughing people shouted back, “I’ll make you pie, baby!” and to the general hooting laughter the candidate returned, “Oh yeah, you gonna make me pie?” Then, after a beat, amid even more raucous laughter, and several other female voices shouting out invitations, “You gonna make me sweet potato pie?” More shouts and laughter. “All you gonna make me pie?”

“Well you know I love sweet potato pie. And I think what we’re going to have to do here”—and the laughter and the shouting rose and as it did his voice rose above it—“what we’re going to have to do here is have a sweet potato pie contest…. That’s right. And in this contest, I’m gonna be the judge.” The laughter rose and you could hear not only the women but the deep laughter of the men taking delight in the double entendre that was not only about the women and their laughing, teasing offers and about their pie that that lanky confident smiling young man knew how to eat and enjoy and judge, but even more now, amazingly, as people came one by one to recognize, about something else. To those people gathered in Vernon Park that bright sun-drenched morning, it was an even more titillating and more pleasurable double entendre, for it was most clearly about something they’d never had but hoped and dreamed of having and now had begun to believe they were within the shortest of short distances of finally tasting. “Because you all know,” their candidate told them, “that I know sweet potato pie.” “

Reference:
Mark Danner [2008]:  Obama and Sweet Potato Pie.  New York Review of Books, 23 October 2008.