BY NBC News

The basics: There are a combined 103 pledged delegates at stake in the two contests (51 for Kentucky, 52 for Oregon).

To put that into perspective, North Carolina alone awarded 115 delegates. Most polls in Kentucky open at 6 a.m. ET and close at 6 p.m. ET, although in the part of the state in the  Central Time Zone, polls close at 7 p.m. ET. Oregon, meanwhile, conducts its contests by mail. In most parts of the state, ballots must be received by 11 p.m. ET, and they can be mailed in or dropped off. Per the Oregon Secretary of State Elections Division, nearly 728,000 ballots (about 36 percent of the vote) have been received by May 18.

Where we stand: Obama leads in pledged delegates per the NBC hard count (1,602 to 1,444), superdelegates (303.5 to 279.5), overall delegates (1905.5 to 1723.5), the popular vote (16,157,639 to 15,583,020), and the total number of contests won (31 to 17). Note: We’re not including Texas in this contest count, given that Clinton won the primary but Obama won the caucus and netted the most total Texas delegates.

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