MA are Republicans, NA are Democrats, you can debate that, but not really. I don't believe this was unintentional.
Financially advanced (Iron-man, Wonder-man, Wasp) or Militarily leaning characters ( Ms Marvel, Black Widow, Ares) and weak-minded (Yellowjacket, Sentry)(this may raise some hackles) not to mention most powerful- Republican
Weaker group, looking out for the most vulnerable of citizens (Cap, Spiderman, Wolverine, Cage, Doc Strange, Hawkeye, Iron Fist, Echo, or Daredevil) underdogs all. Not sure about Spiderwoman.-Democrat
Corporate vs. man on the street.
Republicans won the Civil War battle. Dems will win the final battle and ultimately the war-shortly before the '08 elections.
Is this orchestrated?
I heard the New Avengers are supposed to be Democrat-leaning. In NA #40, Iron Fist and Ronin give a back-alley abortion in Alabama to a 16-year-old who can't scrape together the $400 for a real abortion.
Also, in future arcs, Dr. Strange will convert the Sanctum Sanctorum into a welfare office (because welfare offices are magic; they make money appear out of thin air)!