A testy U.S. Sen. John F. Kerry yesterday blamed clueless voters with short attention spans for the uphill battle beleaguered Democrats are facing against Republicans across the nation. “We have an electorate that doesn’t always pay that much attention to what’s going on so people are influenced by a simple slogan rather than the facts or the truth or what’s happening,” Kerry told reporters after touring the Boston Medical Center yesterday. Conservative political blogger William Jacobson, who writes Legal Insurrection, immediately pounced on Kerry’s comments, saying that attitude is why voters are looking to shake up Capitol Hill by electing...