Donald Trump joked he was worried about the stability of the stage at a North Carolina rally before he called out GOP candidate Mark Robinson’s weight. Trump thanked his supporters and specifically mentioned Robinson, stating: “He’s a great one. And I think we have a lot of our sheriffs here. Don’t we have — where are they? Will this stage hold them?” Trump continued by inviting the sheriffs on stage and jokingly added, “If you weigh more than 200 pounds, don’t come up. I’m only kidding.” As the sheriffs joined Trump on the platform, he continued to make comments about weight and safety concer…