A little while back I was researching Michelle Obama's speeches to the Council on Foreign Relations (now called Chicago Council on Global Affairs) and I thought she was hamming up a stammer she had for authenticity.
I can't find it right now but I'll dig around and if it turns up I'll post it below. I think she gave a great speech apart from lying that America isn't killing people around the world. If that's what American wants it will learn that you can't eat speeches. No matter how good they feel.