here's a fun article https://en.wikipedia.org/w/index.php?title=List_of_state_partition_proposals_in_the_United_States
List of state partition proposals in the United States
Numerous state partition proposals have been put forward since the 1776 establishment of the United States that would partition an existing U.S. state or states so that a particular region might either join another state or create a new state. Article IV, Section 3, Clause 1 of the United States Constitution, often called the New States Clause, ...
en.wikipedia.org