"I'm funding my own campaign." Lie.
"I can not release my tax returns because I'm under audit." Lie.
"Trump University had an A rating from the BBB." Lie.
"I saw thousands of Muslims celebrating 9/11 in New Jersey." Lie.

And on it goes, day after day. Trump is such a pathological liar it is difficult to determine whether he is aware that he is lying or that he is suffering from a mental illness. And then there are the legions of mostly uneducated, older white male voters, who believe him. Or who don't care that he is a liar, probably with the false hope that Trump will help them economically. 

Fortunately, thousands of men and women who actually know something about business have denounced him, including Meg Whitman, Michael Bloomberg, Mark Cuban, Mitt Romney and Warren Buffett.