Reacting to a newly unearthed clip of Sen. J.D. Vance (R-OH) again attacking childless people and calling them “sociopaths,” MSNBC “Morning Joe” regular ex-Sen. Clare McCaskill (D-MO) questioned if anyone on Donald Trump’s campaign did any work at all before he was chosen to be the former president’s running mate. After watching a clip of Vance on a 2020 podcast tell host Chris Buskirk, “I worry that it makes people more sociopathic and ultimately our whole country a little bit less, less mentally stable. And of course, you talk about going on Twitter. Final point I’ll make is you go on Twitte…