"These letters are formally addressed to members of the 112th Congress but are also written for the engaged citizen. Many of the large class of new House members came to office in an election marked by an unprecedented populist fervor for constitutionalism. For that is partly what the Tea Party movement is--a populist constitutional movement--something James Madison would have thought at first glance not merely improbable, but an oxymoron, though on second thought he might have celebrated that the Tea Party represents the fulfillment of one of the Constitution's larger purposes, which was to create a reverence among citizens for the principles of the nation."
Update: I just had to call out this paragraph from the most recent Letter, "A Republican Form of Government" :
"Here Madison may have been too optimistic. The lessons of recent American politics suggest that minority factions can be more dangerous than he imagined. The modern phenomenon he failed to anticipate was a government entrusted with so many responsibilities, and so much power and money, that it becomes a faction unto itself, with its own passions and interests adverse to the rights of other citizens. Those in the control room have both the motive and means to steer the ship of state in directions advantageous to themselves, rather than ones preferred by the passengers who employ them."