Kevin Drum, in a very perceptive essay on the Teabaggers:
Ever since the 1930s, something very much like the tea party movement has fluoresced every time a Democrat wins the presidency, and the nature of the fluorescence always follows many of the same broad contours: a reverence for the Constitution, a supposedly spontaneous uprising of formerly nonpolitical middle-class activists, a preoccupation with socialism and the expanding tyranny of big government, a bitterness toward an underclass viewed as unwilling to work, and a weakness for outlandish conspiracy theories.