Imagine the possibilities in other places too.
If the liberals in California had the SF Bay area and LA County secede, the rest of California would be far more conservative as a result.
If Chicago and/or Cook County seceded from Illinois, the remainder of Illinois as a separate state would be quite conservative.
Ditto, if you could pull Philadelphia out of Pennsylvania. Pull Portland out of Oregon. Pull New York City out of New York state, and see how upstate New York would be.
I know it’s all academic, but if the liberals want to go down this road, conservatives would be happy to play along, as with my examples above.
All sorts of wonderful possibilities in that scenario...