Juan Williams gets at it a bit.
Sarah Palin and Barack Obama shouldn't ever be compared as equals. Obama is head and shoulders above Palin in smarts, character, wisdom and ideas, yet folks who still have issues with Obama have never seen him for who he is. Instead they see him as they perceive him. Their perceptions are tainted by their own assorted prejudices.
Palin is someone who is clearly out of her league.
Ironically, the media she despises is the only one perpetuating the idea that she is a viable candidate for president. Most republicans think she has no chance whatsoever at higher office, especially now.