Vice President Kamala Harris’s presidential campaign kicked off Labor Day by posting past remarks from former President Donald Trump in which he disparages American workers. One video posted by the Harris campaign featured Trump laughing it up with X CEO Elon Musk about the time that Musk fired employees who were trying to form a union at one of his firms. “They go on strike and you say, ‘That’s okay, you’re all gone you’re all gone, every one of your is gone!'” Trump said as Musk laughed in the background. “You are the greatest!” Want more breaking political news? Click for the latest headlin…