The Triple Cities of Binghamton, Johnson City, and Endicott have traditionally been dominated by Yankee fans. This may be due in large part to the minor league Triple Cities Triplets, a New York Yankees affiliate located in JC for many years.
However, the Double-A Binghamton Mets have been in town now for over 15 years. Does that mean a shift of allegiances may be going on? How long will it take?
My personal opinion is that the Yankee stronghold will continue here for a long time - fan allegiance is often passed on through generations, and it will take decades for an entire area to shift. I personally have no problem rooting for my hometown B-Mets as well as the major league Yankees.