Donald Trump’s conservative running mate, J.D. Vance, sparked mixed reactions after a throwback photo of him wearing a shirt depicting the U.S.S.R. flag resurfaced on social media. While some critics slammed Vance for sporting the communist symbol, others argued that it appeared to be a part of a Halloween costume. One user shared the photo and wrote, “JD Vance in a Soviet communist T-Shirt,” and another person added, “This shirt has it all: the star, the hammer and sickle, and the Cyrillic script for USSR … The dude is weird.” A third X user slammed Vance for wearing an outfit that represen…