Salon's delegate counts come from the Associated Press and CNN. Other news organizations have arrived at slightly different numbers; the differences are largely due to varying interpretations of each party's complex delegate-allocation rules. Delegate counts in some states may be tentative until officially ratified at state party conventions.
To secure the nomination, a Democratic candidate needs to win at least 2,025 delegates. A Republican needs 1,191 to win his party's nod.
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Illustrations by Zach Trenholm