something else to ponder: given the increasingly partisan nature of both houses of Congress, and with both parties bargaining less and less with one another, wouldn't a multiparty system force a greater realism and need to compromise upon those in Congress?
also worth pondering, with the increasingly powerful nature of the executive branch, will we soon be able to by-pass representative democracy with direct democracy as de Gaulle in France favoured (and employed to gain his Fifth Republic Constitution)?
Full disclosure: i don't believe in democracy haha.