I don’t know if folks have been back to visit this post, but since it was linked by the Carnival, Volokh, and The Corner, it seems to have accumulated a lot more evidence in defense of General Clark, offered by the commenters.
Example:
I must study politics and war that my sons may have liberty to study progressive taxation.
-John Adams
Or perhaps Clark was digging into his military history:
WE have not yet begun to tax the wealthy!
-John Paul Jones