Barack Obama has declared that he is a candidate for the White House.
He is widely considered to be the first African-American candidate with a realistic chance of winning the presidency.
Mr Obama and Hillary Clinton are the two front-runners to gain the Democratic Party nomination for next year's election.
Mr Obama, who is a Senator from Illinois, made the announcement this afternoon in the State's capital, Springfield.
- Nine News: Niamh Nolan reports on the address by 45-year-old Barack Obama in Springfield, Illinois, at the launch of the Democratic Senator's campaign for the US presidency
- Six One News: Niamh Nolan reports on the address by 45-year-old Barack Obama in Springfield, Illinois, at the launch of the Democratic Senator's campaign for the US presidency

