The Internet

[Animeniax]

I just suck my tummy in and puff my chest out.

Yeah but that requires constant attention and effort. The shirt makes it passive and therefore more likely to succeed.

It's a pretty clever political ad. I honestly don't care who created it (though it's apparently an arm of the Koch political machine), because it is well done and damn entertaining.

Unless you're talking about another Koch, the Koch bros are conservative big business types who fund Republican political campaigns. That'd be strange that one of their subsidiaries made this, unless in jest. Though Colbert regularly lambastes big business and his channel is owned by Viacom.