Trump in 2020: Harold Meyerson; plus McKibben on Climate and Perlstein on Impeachment

Historically, a booming economy means the incumbent will be re-elected -- but NOT in 2020, says Harold Meyerson of the American Prospect: 'Trump Trjumps the Economy," and will not be reelected in 2020. Next up, we talk with Bill McKibben about the Green New Deal and his new book "FALTER: Has the Human Game Begun to Play Itself Out?" Plus: Rick Perlstein on impeachment -- Nixon's and Trump's.