Thorny, Ragnarok and Oripoke make some excellent points about the recent trends. However, there's a long-standing tradition in the US and in its politics in particular, to distrust the highly educated. "Egghead" can be a career-killing insult - just ask Adlai Stevenson, defeated by "I like Ike" Dwight Eisenhower.
"East Coast elite." "West Coast wackos." "Went to college and thinks they know everything." "Bull S***, More S***, Piled Higher and Deeper." "Lies, Damn Lies, Statistics."
Bill Clinton was able to get away with his status as a Rhodes Scholar only through his good ol' boy affability, and the overall tendency of many urban Americans to hear a drawling accent as indicative of low intellect. An avid reader may be told to go outside and get some fresh air and exercise, but you never hear an athlete being told to go inside and read a book already.