There is interesting coverage of The Christine O'Donnell-Chris Coons senatorial debate from the BBC:
"She successfully touched on the talking points that have proved to resonate so powerfully with conservatives - repeatedly referring to the constitution, railing against "Obamacare" and accusing Mr Coons of being a Marxist.
Some call this "dog-whistle politics" - these kind of references hit a pitch, and speak a language that supporters hear differently, and respond to more strongly, than other constituencies. Ms O'Donnell appears to have mastered the technique."
That she understands none of the three bases for her talking points gets a pass.