This episode of Whistlestop travels back to April 30, 2011 when President Obama stepped up to the podium at the White House Correspondents' Dinner to deliver a dig and dig for a laugh. Whistlestop is Slate’s podcast about presidential campaign history. Hosted by our political correspondent and Political Gabfest panelist John Dickerson, each installment will revisit a memorable (or even a forgotten) moment from America's quadrennial carnival. Podcast production and edit by Jocelyn Frank. Research by Brian Rosenwald. Love Slate podcasts? Listen longer with Slate Plus! Members get bonus segments, ad-free versions, exclusive podcasts and more. Start your two-week free trial at slate.com/podcastplus.Email:whistlestop@slate.comLearn more about your ad choices. Visit megaphone.fm/adchoices