GOP rivals cross Iowa with straight-line messages
As the Iowa caucuses approach tomorrow, the Republican presidential candidates are taking different routes to victory. Mitt Romney is barreling dead ahead at President Obama. Ron Paul is on course toward a libertarian ideal. Rick Santorum and Michele Bachmann have a similar message: they are the true economic and social conservatives in the campaign. Rick Perry argues against Washington, drawing applause with talk of a part-time Congress. And Newt Gingrich is trying to head back toward supply-side economics.