"The United States is not a perfect democracy. But one thing we can say is that, in America, political opponents are just that: political opponents. They aren’t hounded and they aren't imprisoned. It isn't a crime to be on the other side of an election. To go down that road is to take a shortcut to despotism and repression.
"On Sunday, to an audience of tens of millions of Americans, Trump voiced his contempt for the norms that define and safeguard our democracy with a promise to jail his chief political opponent. This, again, was the most important moment of the debate. Nothing else—not Clinton's poor answers for her private speeches, nor Trump's abject ignorance—comes close."
In Slate, Jamelle Bouie reacts to Donald Trump threatening Hillary Clinton during the second presidential debate.
As does Charles Krauthammer in The Washington Post.