No need for a separate East Penn. Just cede the Obama voting cluster counties from Philadelphia to Scranton along the NJ line to New Jersey.
New Jersey is a pissant state whose main economic function is to serve as a garbage dump and warehouse for NYC. The East Penn area as described would be a natural fit.
Without Scranton and Philly in the mix, the rest of us could easily outvote Pittsburgh and Erie.
The dividing of or merging of states is prohibited by the Constitution.