Some ideas:

What are the internal contradictions of Hank's political philosophy?  How
do those contradictions reflect paradoxes or tensions of later 19th-century
American politics?

What role does technology play in Twain's critique of British society?
What value does he implicitly place on the powers--constructive and
destructive--of technological innovation?

How do romance, journalism, and satire mix in the narrative techniques of
"A Connecticut Yankee"?  Where do the approaches of the different literary
traditions Twain is working with diverge, where do they converge?

J. D. Stahl