Barack Obama won the Democratic Party’s presidential nomination Wednesday, becoming the first black nominee of a major party, as former rival Hillary Clinton moved for acclamation during a symbolic roll call vote.“I have been asked to inform you that Senator Obama accepts the nomination and will deliver his acceptance speech tomorrow night at the fourth night of the convention to be held at Invesco field,” House Speaker Nancy Pelosi, the chairman of the Democratic National Convention, said after roaring applause and booming music.A raucous group cheered its way to the nomination in Denver after state delegates followed a scripted agreement to give a split rundown vote. The counting stopped when the vote came to New York, and Clinton called for a suspension of the roll call. More