Following his win last night in North Carolina, the Service Employees International Union (SEIU) claimed today that Barack ObamaBarack ObamaMichelle Obama surprises Chance the Rapper with BET Awards video Former Obama aide: ‘We followed the book’ in response to Russian meddling Scarborough: Obama controlling Trump with 'Jedi mind tricks' MORE is the Democratic Party's presumptive presidential nominee.

SEIU endorsed Obama Feb. 15 and has worked to bolster support for him in the Democratic race. According to SEIU, its members have gone door to door and made phone calls for Obama, and SEIU has aired pro-Obama ads on television (see the union's Indiana ad here). SEIU claims 1.95 million members nationwide.