The news – plus barbs from social media trolls and other critics -- may be too much for CNN’s Don Lemon to bear much longer. The host of “CNN Tonight” told an audience in New York City on Thursday that the current “level of toxicity” in society – which he attributed to the Trump presidency – has him questioning whether he’ll still be on the air when the 2020 presidential election rolls around, according to reports. “I don’t know if it’s worth this level of toxicity,” the 53-year-old Lemon said about continuing in his current position, the Daily Beast reported.