Tesla CEO Elon Musk took aim at Sen. Bernie Sanders over the weekend after the lawmaker demanded the wealthy pay their “fair share.” Sanders, an advocate for redistributing wealth, tweeted Saturday afternoon that “we must demand that the extremely wealthy pay their fair share. Period.” Early Sunday, Musk fired back at the Vermont independent. “I keep forgetting that you’re still alive,” he wrote in a tweet. Musk followed that up with another message for Sanders. “Want me to sell more stock, Bernie?” he asked. “Just say the word …” Musk falls under Sanders’ description of “the extremely wealthy” as the...