Trump’s ghosted book about the “art” of the deal was itself a scam. There was no art.
Trump’s artless point is that to be honest or scrupulous about a business deal (or any deal) is for suckers. To stick it to anyone stupid enough to be stuck is “smart,” and that includes any and all governments.
Source: https://www.quora.com/Have-you-ever-met-a-brilliant-scammer