An excerpt from this article, the section on “the secret to fighting Trump”:
“Although he may not have sought the fight with Trump, Khan has proven to be one of the most effective critics of the man who steamrollered his GOP rivals and emerged from his party’s convention with a momentary lead in some polls. Trump’s usual methods, so effective when used against lifelong politicians, failed to dispatch a man who criticized him, not on political grounds but on the basis of values and morality.
“In his DNC speech, Khan didn’t descend to Trump’s level by calling him crazy, nor did he challenge him as a businessman. To do so would have been to engage his opponent on his own ground. Instead Khan questioned whether Trump had ever read the foundational document of American democracy, the Constitution, and offered to lend him his copy, which he took out of his pocket and held in the air.