The Financial Times is one of the most respected news sources in a world that has very few of them. It makes no bones about the fact that Donal Trump is a serial liar. Reputable media do not call a president a liar very easily. Donald Trump has left our reputable media with no alternative. For Trump everything that is true is false and every lie that he tells is true.
Trump's core supporters believe his lies but the rest of the world does not. That creates a real problem for the US and the rest of the world. Trump will continue to lie to his base because that is the source of his power. The rest of the world will no longer trust the US government, and nations that have viewed the US as a beacon of hope will have lost their shining example of good government. The US may no longer count on its allies, who no longer trust its president, to work together on foreign policies. Even worse, nations that live under autocratic regimes will lose their faith in democracy. The era of positive American exceptionalism may be over. Donald Trump has even turned his Supreme Court nomination into a version of his reality TV show.