Senator John Kerry endorses Obama for US president

Barack Obama has won the US presidential endorsement of Sen. John Kerry, the Democrats' 2004 nominee who lost the election to George W. Bush. Kerry, a senator from Massachusetts, plans to announce his support Thursday at a college rally, said a Democrat familiar with Kerry's decision. The 2004 nominee will argue that Obama can best unite the country and has the potential to create transformational change, the person said.