As Mitt Romney puts the South Carolina primary in his rear-view mirror and hits the accelerator in a bid to win Florida, he may discover himself crashing headlong into the bitter legacy of Charlie Crist, the former Florida governor who defected from the GOP and was soundly defeated for the U.S. Senate by Marco Rubio. Romney’s “Charlie Crist” problem is this: Romney’s chief campaign strategist and several of his most senior campaign staff were Crist’s top political advisers — the same ones who crafted Crist’s moderate, ignore-the-tea-party strategy epitomized in Crist’s famous “hug” of President Barack Obama. That strategy led...