Here's a somewhat different U.S. political system than your typical parliament or bicameral congress.
(Still ironing out the kinks, and more just a musing than actually making a statement about the demographics of each area of the U.S.)
In this government, the legislature is composed of councils that are half executive department, half congressional committee, and without the sanctification of the party system found in other systems (no caucusing, no coalition building, ballots are distributed by political groups and not by the state, etc.). Each council has a set of topics it is allowed to make legislation upon, and various inter-council and regulatory bodies make sure that bills are introduced to every committee they are relevant to. The U.S. states are split up between ten regions of semi-similar populations, and each region distributes 5 seats on each council through the Jeffersonian method.
Due to the each council being based around a set of issues, single-issue, multi-issue, and big-tent political parties exist, with splitting one's ballot being common.
Here are the two councils focused on international affairs: the Security Council (Military, Intelligence, Police) and the Foreign Affairs Council (Treaties and Diplomacy). These two have fewer regionalist parties than the others, and are mostly dominated by the three big-tents parties:
Conservative Party - Your typical Center-Right political party. Pro-Military, Interventionist.
Center Party - Moderate/Center-Left, the important swing-vote in both Councils.
American Workers' Party - Pushes a bit more to the left in many fields than the conservatives do the right, but they are very similar to the conservatives in the Security Council when it comes to military affairs.
The following parties aren't found in all the councils, but can be found in both the Security Council and Foreign Affairs Council:
Eagle Party - The Nationalist, Jingoistic Right, they've been moving away from mainline Conservatives alongside gaining more support and the establishment right is a bit worried.
Dove Party - Once the main anti-Military, isolationist Party, they've been out of the limelight due to the Globalists and New Left alongside a more tumultuous global stage.
A singular party can only in the Foreign Affairs Council:
Globalists - Recent Breakaway from the Doves, they are pushing for making more of an impact on the world stage than their more isolationist brethren.
As well, there's one party than can only be found in the Security Council:
New Left - A Break-Away from the American Worker's Party due to the latter's Militarism, they're the Security Council's equivalent to the Globalists.
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