Full quote is "I don't care about geeks, you know? Geeks shouldn't be given power. When geeks get power, you get Hitler. There's a lot of weird and angry geeks out there. But what (a comic book movie) does is it opens up comics as a medium. It stops being geekish. There's comic books for everyone. There's comic books for women, there's comic books for kids, there's comic books for teenage Goths. That is the important thing that movies are doing."
The Obama icon is derived that quote and from Obama being (in his own words) a "geek" who likes comics and Star Trek.