A poll commissioned by likely GOP congressional challenger Joseph D. Malone shows he’s neck and neck with U.S. Rep. William Delahunt as Scott Brown fever continues to grip Bay State voters. Malone of Scituate commissioned the poll that has him with 37 percent of the vote to the Democratic incumbent’s 34 percent with a 5.7 percent margin of error. “I’m very encouraged by it,” Malone said. “My sense is that the voters of the district are people who recognize Delahunt has been following (House Speaker) Nancy Pelosi’s policies and are sick of it.” The former state treasurer’s lead widened to...