Barack Obama met with reporters Friday in Indianapolis and admitted the obvious: "We've had a rough couple of weeks. I won't deny that." The next couple of weeks will show just how rough. The roiling controversies -- over his remarks about rural voters and his ties to his former pastor, the Rev. Jeremiah Wright Jr. -- have cast new doubts over the Illinois senator's ability to win over white working-class Democrats. Tuesday's two primaries will offer fresh data on his appeal. Sen. Obama is strongly favored in North Carolina, while Indiana is seen as a toss-up. If Hillary Clinton gets...