Why are Liberal pundits usually more educated & articulate than Conservative ones?

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Libs
___________
.Rachel Maddow [PhD]
.Keith Olbermann [M.A.]
.Stephen Colbet [PhD]
.Chris Matthews [PhD]

Reps
_____________
.Bill O'reilly [University of "Barely graduated from Highschool"]
.Sean Hannity [Magna Laude in studies of Mein Kumph at Inbreed high]
.Rush Limballs [Did not graduate from elementary school]
.Glen Beck [Alumni of "repeated 8th grade 3 times" University]