Welcome to McCain picking Palin PURELY for playing political poker. McCain shows that he isn't to keen with her during any public appearances. He picked her for:

Her hottness (Pull in the young crowd)
Her (Pull in the Hillary crowd)
Her 5 kids (Shows family ties)
Her Boobs (Pull in the lonely fat crowd)
Her Down syndrome kids (Pull in the families with disabilities)
Her State (LARGE connection with oil)
Her attractive husband (Pull in the female votes)

So McCain is playing PURE political poker here and nothing else.

But his wife drifting...that's just fucking