New Ideologies and existing ideology tweaks – New ideologies were given to the US IGs to better represent their historical stances on various political issues (Given on the second day). Autocratic coup is less likely because of this. Jacksonian Democrat also has a few law stances tweaked for authenticity. See the screenshot for more details! (New nations that is created from USA will inherit these new ideologies)

Anti-Slavery AI Strategy for USA – Emboldens them to push through legislation despite of Slaver Revolts.
Slavery Law AI Tweaks – Slavers can now demand a restoration to legacy slavery from slavery banned. USA with an abolitionist in power or in government will be more willing to pass slavery banned.

Guided US AI – USA when played by an AI will seek to befriend Texas 8 years into the game, unless the player is controlling Texas. 15 months after that their attitude with Mexico will be set to belligerent unless the player is controlling Mexico. This doesn’t mean the US is guaranteed to annex Texas peacefully, nor does it mean they will always declare war on Mexico on schedule, but they should be more likely to do so now.

USA Historical Characters Tweaked – Teddy and Abe are both buffed. Theodore Roosevelt is now a social democrat to represent his Progressive Party Pro-Social Security Policies. Abraham Lincoln is still an abolitionist, unless slavery is banned when he shows up, in which case he becomes a radical. Both are each given a stronger trait set to ensure they will run in elections.

Partial ECCHI implementations – Many historical Characters that were deemed important to have in order to simulate the build up to the American Civil War is integrated from ECCHI. Though most has their traits and ideologies tweaked. The ported characters include: Martin van Buren, William Henry Harrison, John Tyler, James Knox Polk, Millard Fillmore, William Henry Seward, Jefferson Davis, and Alexander Hamilton Stephens.

Albany Regency – At the beginning of the game, Martin van Buren still has his powerbase supporting him, this will disappear 55 months into the game. Just after the second election starts.

Old Characters reshuffled – A few base game characters are moved around to make way for the new characters ported from ECCHI. John Calhoun is now an landowner agitator so as to give Polk the leadership. Winfield Scott is designated as an abolitionist to ensure he stays in the Whig party. Daniel Webster now leads the industrialists, with Cornelius Vanderbilt waiting in line.

Loadbearing Modifier – The Missouri Compromise decaying modifier USA starts with now has many additional effects. Put there to simulate various aspects of the 1836 political landscape. These include: A resistance to revolution, a reduction in pop support of slavery political movements, and an initial increase to the landowner’s Approval to simulate the slow burning paranoia of the south and the gag rule. This modifier will go away if slavery is banned! Likely triggering an early civil war!

Companion Modifier – The Compromise comes with a shadow version of itself, one that isn’t decaying, to compliment the decaying version. This adds a non-decaying pop support increase of slavery movements and Landowner Disapproval. Taken together by the 1860 the south will most likely try to revolt. A few other effects are added to make the government system more closely simulate US politics.

A House Divided and Fierce Defiance– When the civil war does happen, both sides of the conflict will gain substantial buffs to adequately prolong the historically bloody conflict. CSA will also regain war support on every battle lost.

Third Party System and Two Party Fixed – When the ACW fires, the USA intelligentsia and landowners will temporarily be de-clouted in order for new party dynamics to form. “US Two Party Fixed” is integrated for this purpose as well. Briefly, this means the orange party will become the new republicans, and the green party will become the new democrats. With the IGs more evenly split between the two.

Reachable Arapaho: 4 provinces (tiles) were given to USA in order for them to be able to reach Arapaho.

Historical Oregon Dispute Resolution – A third way of resolving the dispute is given the to USA. If their relation with GBR is 50 or more, AND they are fighting a war with whoever is holding California. This will pressure both sides enough to reach a fast resolution. As was historically the case in 1846. The tweaked to the JE as done by VTM is also integrated for better compatibility.

Persistent Southern Paranoia – USA will generate a Wrathful Persistent slaver agitator every election cycle until the civil war journal entry is resolved. Jefferson Davis, a slaver landowner leader will be generated in the 1860 election cycle.

Washington Precedent (Term Limit) – When a USA president is already elected once, and they got elected again, they will step down as the IG leader, still staying the ruler for their lame duck years.
Opportunistic Landowners – When a pro slavery revolt hits 75% landowner IG will join the insurrection if they weren’t in it already.

Civil War Borders Fixed – When the ACW fires, all slave states will join CSA, alternatively, all free states will join FSA. Except for the border stats. The capital for the US will stay DC.

Border States Logic –The historically loyal slave states, MISSOURI, KENTUCKY, MARYLAND, DELAWARE, and WEST VIRGINIA. Will stay with USA. Any states that gained slave state status via the bleeding Kansas event will do likewise. (Unless they are down south in Dixie (New Mexico and anything south of it))

ACW events fixed – The Wilmot Proviso will only fire after the Mexican-American War (MAW) is done. The choices will also have actual consequences now. Bleeding Kansas Will only fire AFTER Proviso fires. And the Caning of Charles Sumner will only fire AFTER Bleeding Kansas. The Caning Event also will no longer kill the caned character, instead giving them appropriate traits.

Incorporated 1.7.2 tweaks such that "legacy slavery" law no longer buffs LO clout and having the "human rights" tech make your pops want to get the "slavery banned" law.