Obama threw the ceremonial first pitch at the All-Star Game. I would like to tell you how he did, but the only videos I can find do not show the ball at the time it reaches home plate.
Here is the description and the clip (http://sports.espn.go.com/mlb/allstar09/news/story?id=4326841);
"President Barack Obama was true to his word: He didn't bounce it.
Obama's ceremonial first pitch at the All-Star Game barely reached the plate Tuesday night. St. Louis Cardinals star Albert Pujols helped the president, moving up on the plate and reaching out to scoop the toss."
Based on the description it sounds like the pitch was not a strike, but not off by much.
In the video from http://gatewaypundit.blogspot.com/2009/07/obama-booed-in-st-louis.html, it sounds like there were some boos in the background though the cheers were louder.