The winner:

“But I always say what I mean! Eh, let me think about that for a sec.”– AZREP

Runners-up:

Moderator: “Would you gentleman like to disclose the extent of your charitable giving last year?”– LCALLDAY

“I’m a motorboat! …BubbBubBaBbbubububub!”– BENINNY

“Joe the American people demand an answer, how do you know the President has a really big stick?”– ARMADABOY