One of Capitol Hill's most-active stock traders is sending a company with well-defined competitive advantages -- that also happens to be on the verge of its first-ever stock split -- to the chopping block.Over the three previous weeks, Wall Street's major stock indexes have sent a stern reminder to investors that equities don't move up in a straight line. The iconic Dow Jones Industrial Average, benchmark S&P 500, and innovation-powered Nasdaq Composite have all retraced by at least 5% from their respective ...