According to a Gallup tracking poll, Mitt Romney failed to get a boost from last week’s Republican National Convention. An analysis said: “Romney is the third candidate and the first Republican since 1964 to not receive a convention bounce in the Gallup Poll, putting him in the company of George McGovern and John Kerry.” (See the Gallup numbers.) Will President Obama do better in the wake of his Charlotte acceptance speech? If so, how much?