MS NOW

To address the impeachment threat, Trump will first need to understand it

Asked about impeachment, Trump said, "I'm not concerned, no." His explanation why suggests he doesn't quite understand the nature of the threat.

Steve Benen is a producer for "The Rachel Maddow Show," the editor of MaddowBlog and an MS NOW political contributor. He's also the bestselling author of "Ministry of Truth: Democracy, Reality, and the Republicans' War on the Recent Past."