Two polls out Friday show former House Speaker Newt Gingrich’s campaign gaining traction. And both polls show there’s plenty of room for the race to change dramatically: 17% of respondents are undecided. A McClatchy-Marist poll of Republicans and Republican-leaning independents finds that Mitt Romney’s poll numbers remain steady – he generally garners the support of about a quarter of the Republican and Republican-leaning voters. That puts him in the lead, with Mr. Gingrich in second and former front-runner Herman Cain close behind. By the numbers: Mr. Romney, 23%; Mr. Gingrich, 19%; Mr. Cain, 17%;Texas Rep. Ron Paul 10%; Texas Gov....