Obama vows to reverse Republican legacy

Barack Obama launched a sharp assault on Republican presidential rival John McCain on Thursday with a promise to reverse the economic failures of the past eight years and restore America's global reputation.

The first black presidential nominee of a major US party linked Mr McCain directly to President George W. Bush and said their failed Republican policies were responsible for a faltering US economy and a decline in US standing in the world.

"We are here because we love this country too much to let the next four years look just like the last eight," Mr Obama told a flag-waving crowd of about 75,000 supporters in Denver's open-air football stadium as he accepted the Democratic nomination on the last night of the party convention.

"On November 4th, we must stand up and say: 'Eight is enough'," Mr Obama said.

The speech opened a two-month sprint to the November 4 general election against Mr McCain, who tried to steal a share of the limelight with word he had chosen his running mate and then appeared with his surprise choice yesterday in Ohio.

Mr Obama and running mate Joe Biden also were scheduled to hit the campaign trail after Mr Obama delivered his biggest speech in a career filled with big speeches on the 45th anniversary of Martin Luther King's I Have a Dream speech - a landmark in the US civil rights movement.

Mr Obama said Mr McCain, an Arizona senator, was out of touch with the day-to-day concerns of Americans and had been "anything but independent" on key issues like the economy, health care and education.

"Now, I don't believe that Senator McCain doesn't care what's going on in the lives of Americans. I just think he doesn't know," said Mr Obama, who had been urged by some Democrats to take a tougher line against Mr McCain. "Senator McCain likes to talk about judgment, but really, what does it say about your judgment when you think George Bush was right more than 90 per cent of the time?" Mr Obama asked, citing Mr McCain's voting record in the US Senate.

"I don't know about you, but I'm not ready to take a 10 per cent chance on change," he said.

The televised acceptance speech by Mr Obama gave the first-term Illinois senator his biggest national audience until he meets Mr McCain in late September in the first of three debates. The two are running neck-and-neck in polls.

After the speech, the McCain campaign fought back.

"Tonight, Americans witnessed a misleading speech that was so fundamentally at odds with the meager record of Senator Obama," McCain spokesman Tucker Bounds said in a statement. "The fact remains, Obama is still not ready to be President."

The speech included some of the most direct attacks on Mr McCain by Mr Obama since the general election campaign started. Mr Obama, whose patriotism has been the subject of internet attacks, said the candidates should be able to disagree without destroying each other's character.

"I've got news for you, John McCain. We all put our country first," Mr Obama said.

Mr Obama, an early opponent of the Iraq war, promised to "end this war in Iraq responsibly" but said he would finish the fight against al Qaeda in Afghanistan and would be willing to use US military power when necessary.

"As commander-in-chief, I will never hesitate to defend this nation, but I will only send our troops into harm's way with a clear mission and a sacred commitment to give them the equipment they need in battle and the care and benefits they deserve when they come home," Mr Obama said.