PPP has polled Newt Gingrich and Ron Paul for the first time in the potential 2012 Republican presidential race nationally, and their presence reduces support for the other candidates, particularly Mitt Romney. What was a decent advantage for Romney in a three-way race with Sarah Palin and Mike Huckabee is now a four-way draw, with Paul in a distant fifth and Romney slipping to a close second. Huckabee has 25 to Romney’s 23, Gingrich’s 21, Palin’s 20, and Paul’s 8, with only 3% undecided versus last month’s 17% with more limited options. Gingrich’s entry into the field erodes Romney’s support...