Mitt Romney on Monday laughed at Newt Gingrich’s suggestion that he is a weak frontrunner who is failing to win over conservatives, saying of the former House speaker, “If I’m a weak frontrunner, what does that make Newt Gingrich? Because I’m well ahead of him.” Celebrating his 65th birthday on the campaign trail in Mobile, Ala., Romney said in an apperance on “Fox & Friends” that he finds it “funny listening to these guys” trying to attack his standing in the 2012 race. “They’re saying what they wish were the case but happens not to be the case. Don’t forget...