Pravada is actually pretty good at exposing Obama. I think they posted her letter as semi-satire like The Onion.
My favorite Onion opinion columnist is Jim Anchower and Jean Teasdale. (note they are not real people but made up characters)
http://www.theonion.com/content/columnists/view/anchower
Just image if Bush had tried half of the "dog ate my homework" jive our alibi Ike in chief dishes every day.