No one outside Trump's inner circle — and maybe not many of them — knows who he talks to before tweeting or how many hands a tweet goes through before landing in public. If he's sharing their content in advance, the chance exists that someone will eventually find the temptation irresistible to score a few easy thousands by trading ahead of the tweet. The result will be a scandal that won't be at all hard to explain to the voters. And that's leaving aside the possibility that Trump himself might profit from a market-moving tweet. (Trump's spokespeople say he sold all his stocks earlier this year, but they've provided no documentation.)