Her arms, and her complete confidence in her skin, are a reminder that
Americans can do anything if they put their minds to it.
Oh, and btw, she [Michelle] can presumably say something intelligent about cap-and-trade if pressed. Now I don't understand why Michelle Obama is supposed to represent all that -- she didn't get elected president. The general attitude towards Mrs Obama is more than a little irritating. It's just assumed that she doesn't fit the housewife stereotype because she looks tall and muscular and flashy, and therefore "formidable"; it isn't like she does anything interesting. Sort of like MoDo, in a sense, who tries to mask her near-Kristofian inanity by flooding her articles with digressions and wordplay.
As if one could be too incoherent to be unoriginal.