A former MSNBC host unloaded on Donald Trump’s running mate, J.D. Vance on Friday over a late-night post Vance made defending his choice to “change my tune” on the MAGA leader. Vance made a lengthy post on X, writing: “If you were to ask what caused me to change my tune about President Trump from 2016 to 2020, I could give you a few reasons. But what we’re seeing in Springfield really drives it home.” Vance cited “skyrocketing” housing prices, as well as rising cases of communicable diseases, crashes, crimes and even insurance premiums. He also decried the government’s response to those allege…