Speaking with CNN International on Saturday, Professor Inderjeet Parmar of City University and the forthcoming The Trump Project explains why it is necessary to challenge the lies of Donald Trump — in the latest case, about his phone call to the widow of a Green Beret killed in action — and the defense offered by White House Chief of Staff and former four-star general John Kelly.

We are living in an age of post-truth politics. You can pretty much say whatever you like and then you can deny it, move back on some of it, or not even bother to correct the mistakes you’ve made….

John Kelly hasn’t been able to restore order. He’s become part of the disorder.

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