Trump Tests the Definition of <em>Insider Trading</em>

This is an edition of The Atlantic Daily, a newsletter that guides you through the biggest stories of the day, helps you discover new ideas, and recommends the best in culture. Sign up for it here. For Donald Trump, social media is a fundamental component of the presidency. He shares his thoughts freely and constantly;

Wall Street firms will get information milliseconds faster than the general public—and Trump will directly benefit.