Why aren't smart people elected?

Instead of relying on charisma, why not have Presidents based on intelligence and knowledge?  Someone who has a masters or professional degrees, has written papers and books, and is just a really knowledgeable guy?  Rather than, um, someone who's not.

>>That's part of why it kind of sucks that Howard Dean imploded his own campaign

More like it kind of sucks that the media convinced everyone that Howard Dean imploded his own campaign.