Barack Obama won the North Carolina Democratic primary Tuesday, FOX News projects, preventing Hillary Clinton from staging an election-day upset in the Tar Heel State. Clinton took the lead in Indiana, but it was still too early to call the race. The two states are the last big contests on the primary calendar and together offer the final chance for the candidates to make a serious dent in the delegate counts. Both candidates were faring well among bases usually loyal to their campaigns Tuesday. In Indiana, Clinton’s advantage is based on groups that have supported her in earlier primaries —...