Premise: Lewis Cass wins the presidential election in 1848, preventing the OTL Compromise of 1850 from ever materialising. Instead, he supports the concept of Popular Sovereignty, which, through pressure from pro-slavery elements in the Democratic Party, eventually leads to Texas being reorganised and split into four slave states in 1849, as being legally provided for in the OTL Joint Resolution for Annexing Texas to the United States on 1 March 1845. The joint resolution allowed for four additional states, but in this scenario, there will be only three additional states. The four states on the map above are West Texas (orange), East Texas (green), New Mexico (purple), and Jefferson (blue). My question now is: Do you see any issues with the premise in general or the division as it's laid out in the map?