President Donald Trump's miscalculations of an opponent are now dragging an unsuspecting family member into a lawsuit, per a legal expert. After Trump refused, the BBC sent out dozens of subpoenas, with one possibly reaching his youngest son, Barron Trump. "Attention, Barron Trump, you may be coming in to testify in a court of law," Popok said. You can sue who you want, but you can't dictate how they're going to defend the case." "Barron Trump's even been mentioned."