"Clearly, we have a President who does not understand what our Constitution about, what democracy is about. And I think there is a fear in this country of this nation under Trump moving into a more authoritarian mode," Sanders said. Adding that he also calls the President a "pathological liar," Sanders said he didn't feel good using such harsh terms. "I disagreed with George Bush all the time -- never called him a pathological liar, because he was not. Just a conservative president. But this guy lies all of the time," Sanders said of Trump.