Newt Gingrich has taken the lead in PPP's national polling. He's at 28% to 25% for Herman Cain and 18% for Mitt Romney. The rest of the Republican field is increasingly looking like a bunch of also rans: Rick Perry is at 6%, Michele Bachmann and Ron Paul at 5%, Jon Huntsman at 3%, and Gary Johnson and Rick Santorum each at 1%.
