Political Parties in the US and Westeros

Preamble

In this Age of Trump™, many people have become triggerable by any number of perceived slights, outrages, microaggressions, macroaggressions, cats of questionable behavior, bad dogs, wily stoats, ferrets that have run off the rails, bad toupées, the continued existence of the Bill of Rights and other Constitutional "artefacts" considered whimsical, passé, evil, outmoded, crude, etc., so I feel it's essential to make a disclaimer in this here preamble: I ain't singling anyone out — I'm mocking them all and not caring if God or anyone else sorts them out. It's all nonsense meant for the enjoyment of people of any political leaning.

Lannisters are Republicans

What do you call rich people who cheat in business and politics to get ahead and fight stupid wars all the while running up huge deficits and debts and starving their people? Lannisters. Or, Republicans. Now an argument against this connection between the Lannisters and Republicans was brought up by Morris J Banderschwingle of Funkley, Minnesota, who asserted that it can't be true because Tyrion Lannister is occasionally funny and Republicans are congenitally unfunny. This is mostly correct, but Republicans have occasionally been known to be funny occasionally. Consider the neo-Dadaism of Republicans riffing on "fiscal discipline". Lolz.

Starks are Democrats

Well-meaning self- and other-destructive incompetence is a hallmark of the modern Democratic party. If you doubt that, google POTUS. Google Libya. The Baratheons were in the running for this, especially considering the parallels between Stannis and HRC, but the Starks "win" because they lose despite every advantage they possess. Ned figures out "the big secret" then goes and threatens Cersei with nothing to back him up. Of course, he's going to get stabbed in the leg and have his head chopped off. They fight even stupider wars than the Lannisters do, and their idea of foreign *and* domestic policy includes extrajudicial assassination of foes whether they are citizens or not, due process be damned. What's that you ask? That pinch her cheek she's so damn cute ninja death assassin Arya Stark. Barak Obama would be so proud. Don't get me started about Catelyn zOMG. Robb SMDH. Oy!

Freefolk are Libertarians

This one is too easy. Although they aren't especially doctrinaire libertarians since they will occasionally violate the non-aggression principle central to almost all variations of libertarianism, with all that trans-wall raiding and excepting that jacknozzle Craster, they are at least libertarian with each other, discounting the Thenn, who occasionally eat their Freefolk neighbors. But, on the whole, they associate with those they want to associate with, delegate problems to people who can fix them, and generally do as they please within the context of their families, tribes, and clans. Runners up in this category are the Braavosi, although they are probably better described as Hayekian Old Whigs. There are no Rothbardians in Westeros.
How cool would it be if Tormund and Brienne left Westeros together, went to Braavos and set up a marijuana dispensary and made lots of giant babies? I'm sure there's a sequel in there somewhere.

Daenerys is the Democratic Socialist

You are going to be free, if I have to burn every last one of you to freedom through death. Who would have made a really awesome Daenerys Targaryen? Alexandria Ocasio-Cortez. Think about it. Think of those Daenerys rants that pop out every now and again. AOC could deliver them maybe even better than Emilia Clarke. Jon Snow is kinda like a hot, young Bernie Sanders chasing AOC-Daenerys around poking his policy sheet "but we hafta take care of these White Walkers befora we consida mattas related to budgetary discipline…" AOC-Daenerys: "Screw that! I'm going to burn all of the White Walker deniers with my dragon and give away all sorts of goodies because we're getting out of the Gold Dragon standard and going to a fiat currency that will let me print whatever I need to provide Unicorns-for-All and a Prismatic New Deal!"

The Faith Militant are (were) Communists

Or were. Cersei dropped nuclear hellfire on her Communist opponents and collaborators, but they were a thing, for a while.