Donald Trump launched a series of disparaging social media posts against Kamala Harris over the weekend. What Happened: Trump took to his Truth Social platform on Saturday to post a series of derogatory remarks about Harris, including calling her “low IQ,” “dumb,” and questioning her “mental capacity” to engage in a debate with him. This marks a significant escalation in Trump’s rhetoric against Harris, despite warnings from his party against such personal attacks. Trump’s tirade began on Saturday when he withdrew from the ABC News presidential debate scheduled for Sept. 10. He instead suggest…