FEBRUARY 15, 2012 Romney Races to Defend Michigan State Up for Grabs as Santorum Surges BY JOSEPH B. WHITE AND NEIL KING JR. [Subscriber Content Preview] DETROIT—Amid signs Rick Santorum could win an upset victory in Michigan, Mitt Romney escalated his campaign to win the state's Republican primary by taking on the powerful auto union and reigniting the debate over the federal bailouts of two Detroit auto makers. Mr. Romney, writing in a Detroit News editorial-page column Tuesday, attacked as "crony capitalism on a grand scale" the Obama administration's $81 billion auto-industry bailout nearly three years ago. The salvo comes...