Obama says time for change has come

Barack Obama, the clear victor in the Democratic caucuses in Iowa, declared tonight that "our time for change has come" and that voters are "choosing hope over fear."

"They said this day would never come, they said our sights were set too high, they said his country was too divided, too disillusioned to come together for a common purpose," he told screaming supporters. "But on this January night, at this defining moment in history you have done what the cynics said we couldn't do."

Taking the stage with his wife Michelle and his two young daughters, Obama was already pointing to the contests ahead.

"You have done what the state of New Hampshire can do in five days," he said. "You have done what America can do in this new year."