In NY, there has been a movement ( small but active ) for Long Island to secede and form its own state.
But how do you divide California??
Here's one possibility... as presented by this website
The political facts of life are that even with just three states Californians would gain four U. S. Senators, no small concern for the other states. However, a division as suggested here as of 2004 would create four open Senate seats unless incumbents Diane Feinstein or Barbara Boxer relocated, for they both would live in Coastal California which would be the most liberal new State.
The new Southern California and Northern California would likely present new opportunities for both of the two major parties with the real possibility that two conservatives and one or two moderate Republicans could take the seats. Of course, Democrats could take the seats also, but the point is that true opportunities would exist for both parties. This should make the idea more appealing in the current Congress.
Political realities aside, the three new states would constitute "average sized" states when compared to the rest of the states.
So how would the Three Californias stack up in the ranking with a total of 52 states?
Southern California would be the 2nd most populous state, slightly behind Texas, and 21st in area, ranked between Washington and Georgia.
Northern California would be a bit larger in area, ranking 19th between Oklahoma and Washington, but would be 21st in population between Maryland and Arizona.
Coastal California would be 9th in population, between Michigan and New Jersey, and 42nd in area between South Carolina and West Virginia.
With the division of the state, Californians would find themselves in states more comparable to others in the Union. Each of the new states would have political influence similar to most other states. Each would have a clearer image of what the state was about.