“For Donald Trump, crime is not a problem to be solved; it is a weapon to be wielded”—against people of color and immigrants: Chris Hayes talks about how Trump has transformed this long-standing weapon of the right. His book A Colony in a Nation is out now in paperback, with a new afterword. Chris is an editor-at-large of The Nation.

Plus: Gary Younge explains how the Parkland kids are changing the fight for gun control. He knows a lot about kids and guns—he wrote the award-winning book Another Day in the Death of America: A Chronicle of Ten Short Lives. Gary is a columnist for The Nation.

And Michael Walzer argues that a foreign policy for the left has to begin with internationalism, and with the choice of comrades abroad. His new book is A Foreign Policy for the Left. Michael edited Dissent for three decades and is the author of many books, including Just and Unjust Wars. He wrote about “A Solidarity of Leftists” for The Nation.