James Fallows implores the news media to report that Trump actually lies when he lies:
The United States is seeing both a chronic and an acute new version of this public-information problem. ...
The acute version is the emergence as president-elect of a man whose nature as a liar is outside what our institutions are designed to deal with. Donald Trump either cannot tell the difference between truth and lies, or he knows the difference but does not care. Tiniest example: On a single day during the campaign, Trump claimed that the National Football League had sent him a letter complaining that the presidential-debate schedule conflicted with NFL games (which the NFL immediately denied), then he said the Koch brothers had begged him to accept their donations (which they also flat-out denied).
Most people would hesitate before telling easily disprovable lies like these, much as shoplifters would hesitate if the store owner is looking at them. Most people are fazed if caught in an outright lie. But in these cases and others, Trump never blinked.
The news media are not built for someone like this.
Think Progress and The Daily Beast concur that Trump is engaged in an all-out battle against democracy itself.