Shawn Johnson Says the Pledge of Allegiance at the Democratic National Convention

Shawn Johnson has been everywhere this week. Her latest stop was at the Democratic National Convention, where she said the Pledge of Allegiance:

(Video via Cousins of Ron Mexico at The Big Lead.)

A couple of questions occur to me about the above video, which includes the added bonus of a great rendition of the national anthem.

1. Is there a risk that Johnson is getting overexposed here? From Beijing to Letterman to Des Moines to Denver, does she have a chance to just be a regular teenager?

2. What's the deal with Olympic gymnasts and saying the Pledge at the conventions? Mary Lou Retton has said the Pledge at the Republican National Convention. Is it just that conventions usually happen shortly after the Summer Olympics and so gold medal gymnasts are usually in the news, or have focus groups determined that swing voters enjoy seeing patriotic gestures from gymnasts?