The world's best troll will be when this project gains a critical mass of publicity and Obama himself agrees to play the role of trump. Then several voice coaches would volunteer to help Obama perfectly reproduce Trump's slurred speeches and memorable lines.

Or maybe it goes in the opposite direction, where he emphasizes his own trademark mannerisms in order to erase any similarity to Trump. He'd be wearing a tan suit, a blue tie, and be all "Look. Uhhh... Nothing bad... can happen! It uh, it can only good happen. But with Tylenol, don’t take it. Don’t take it!”