Obama actively sought the New Party's endorsement and urged the Marxist members to join his campaigns. The New Party went so far as to claim Obama as an official member of their organization. The New Party socialists were affiliated with the Democratic Socialists of America.
Of course, Obama has a long history of relationships with Marxists. His first mentor in high school was noted Communist Frank Marshall Davis. He admitted he attended socialist conferences during his college years in his first book, "Dreams From My Father", page 122: