Barack Obama outscored his Republican rival, Vietnam veteran John McCain, in a report card issued by an influential, nonpartisan veterans’ group. The Iraq and Afghanistan Veterans of America (IAVA’s) Action Fund gave the Arizona senator a “D” as part of its congressional report card. Obama received a “B” from the group. McCain is among three senators who scored a “D.” Only one senator, Jim DeMint (R-S.C.), received an “F.” McCain — a former Navy officer and prisoner of war — and Obama, who has not served, have made military and veterans’ issues central to their campaign as they try to...