Donald Trump’s youngest son, Barron, turned 18. While some media insiders suggested this made it “fair game” to go on the attack, other political onlookers on the left and right said to leave him alone. Born March 20, 2006, Barron has largely remained out of the political eye. But as he turned 18, former NBC executive Mike Sington wrote, “Barron Trump turns 18 today. He’s fair game now.” A popular social media satire page called Liam Nissan also said, “Barron Trump turned 18 but I will leave him alone until he says something stupid in public.” ALSO READ: Trump is exploiting, abusing, playing, …