As with salesmen, advertisers, lawyers, and other politicians, Trump's relationship with the Truth is spotty. He exaggerates his successes and exaggerates the failures (and claimed failures) of is political opponents. Certainly more so than most other politicians.
He is always in the spotlight - the Media love him - and his remarks are always under scrutiny. When Schumeer, Schiff, Jeffries, Pelosi, et al, do their lying, it goes without comment in Press, does it not? To cite the most prominent current example, how many in the non-Fox Media have called out Democrat "leaders" for continuing the claim that the Republicans engineered the current shutdown, when that is manifestly false? None of them.
One might argue that the Dems' lies are more substantive. O'Bama, knew he was peddling an egregious lie when he campaigned for the Affordable Care Act; he knew that by forcing insurers to cover those with expensive conditions on the same basis as healthy clients, health insurance premiums would necessarily rise. Biden intentionally opened the Southern border to many millions of unvetted Third World wretches, claiming all the while that the only solution was "comprehensive immigration reform" (amnesty, followed by naturalization). That was a whopper, was it not? Leftists have claimed for decades that "climate change" (nee "global warming") was an existential threat to humanity, justifying scores of stupid and counterproductive laws to impose greater and greater controls on private economic activity. This is now exposed as a cynical lie.
But you know what you are getting with Trump, eh? He is an incurable blowhard, who happens to accomplish more in a good month than any of his predecessors did in a four-year term. And there have been several good months already; he's just getting started.