It was a split decision Tuesday night as Barack Obama captured the North Carolina Democratic primary and Hillary Rodham Clinton won a closely-contested Indiana primary.

Obama won at least 94 delegates in the North Carolina and Indiana primaries, according to an analysis of election returns by the Associated Press. Clinton won at least 75 delegates, with 18 still to be awarded. Unlike the Republican's "winner-take-all" method, Democrats are awarded pledged delegates according to the percentage of the vote they earn in each state's primary.

Recent polls show the Illinois senator has his work cut out for him.

Next up for the Democratic rivals is West Virginia on May 13. A Rasmussen poll taken Monday has Clinton leading 56 to 27 percent over Obama, with 17 percent undecided. West Virginia has 39 delegates up for grabs and should be favorable ground for Clinton because of her success appealing to blue-collar voters who are prevalent in the state.

Kentucky and Oregon follow on May 20 with their 60 and 65 delegate votes at stake, respectively.

Kentucky posted almost identical results to West Virginia in a recent poll, with Clinton leading 56 to 31 percent over Obama, with 13 percent undecided, according to Rasmussen. A poll taken on Monday in Oregon has Obama leading the New York Senator 51 to 39 percent, with 10 percent undecided.

It is likely not enough delegates will be at stake in the remaining primaries through June 3 to give either Obama or Clinton the 2,025 delegates necessary to win the nomination.