""Orwellian" is an adjective describing a situation, idea, or societal condition that George Orwell identified as being destructive to the welfare of a free and open society. It denotes an attitude and a brutal policy of draconian control by propaganda, surveillance, misinformation, denial of truth..." (https://en.wikipedia.org/wiki/Orwellian).
All world leaders propagandize and evade the complete truth. They shade facts to fit their causes. This is nothing new.
But Donald Trump's blatant and callous and constant disdain for the truth -- such as claiming millions of people voted for Hillary Clinton illegally -- is of another order entirely. He will be our first President for whom we should not believe a single utterance from his mouth. James Fallows is correct: call him a liar. I'll add: call Trump a fool, laugh in his face, and make it clear at every possible turn that he lost the popular vote. He is unfit to lead and unworthy of respect.
In 1984 (Orwell's masterwork) the rulers eventually control everything because the people do not take them seriously soon enough. This must not be our fate.