Sitting in a room with the leaders of the country's largest retailers would look decidedly different today than it did two years ago as CEO shakeups have rocked the industry. Target Chief Executive Gregg Steinhafel 's sudden departure, announced Monday, was just the latest addition to a long list of executives caught in a nasty game of musical chairs: J.C. Penney. Lululemon. American Eagle. T he list of companies that have undergone recent leadership changes goes on. And given the weakness expected out of the sector's first-quarter earnings, it likely isn't over.