Margaret Sullivan: Trump’s jokes with Putin over eliminating journalists is a betrayal of America. So is ignoring it.

U.S. President Donald Trump, right, and Russian President Vladimir Putin pose for a photo during a bilateral meeting on the sidelines of the G-20 summit in Osaka, Japan, Friday, June 28, 2019. (Mikhail Klimentyev, Sputnik, Kremlin Pool Photo via AP)