Also from this article, here are the reasons why Palin is a terrible VP pick.

• She’s inexperienced.
• McCain can no longer argue that Obama is inexperienced.
• It’s an obvious ploy to lure disgruntled Hilary supporters.
• The ploy shows that McCain obviously doesn’t put America first, since he’s willing to put someone inexperienced a heartbeat away from the presidency.
  
• It calls attention to the fact that McCain is the oldest presidential nominee in history, since we have to take his VP pick into serious consideration.