Abdul El-Sayed and Gary Peters turned a Michigan campaign stop into a broader attack on Donald Trump, Republican leadership and what El-Sayed described as a political system dominated by corporations, billionaires and special interests.El-Sayed delivered one of his sharpest lines of the event when he argued that Trump himself is not the root problem:“Donald Trump is not himself the disease of our politics. He’s the worst symptom of the disease of our politics.”