Sen. J.D. Vance, the running mate of former President Donald Trump who frequently calls childless Americans psychotic sociopaths, explained in an interview released Friday why he told his 7-year-old son to “shut the hell up.” “I’m on the phone with Donald Trump,” Vance told conservative podcasters the Nelk Boys. “I’m like, ‘Son, shut the hell up for 30 seconds.'” This father-son moment appears in Vance’s lengthy narrative of the historic day when Trump told the Ohio Republican he’d been chosen to be the former president’s running mate. Want more breaking political news? Click for the latest he…