Obama makes a final pitch in radio address

— Barack Obama said his election would help change the country and the world, as the Democratic presidential nominee personally delivered his party's radio address for the final weekend of the campaign.

"If you give me your vote on Tuesday, we won't just win this election — together, we will change this country and change the world," Obama said.

Obama used Saturday's radio address to restate his core campaign talking points. He said the election comes during the worst economic crisis since the Great Depression, affecting people's jobs, home values, pensions, wages, health care and college costs.

"At a moment like this, with so much at stake, we can't afford four more years of the tired, old, trickle-down, on your own philosophy that got us into this mess," he said. He criticized Republican rival John McCain as being too closely aligned with President Bush.

Obama promised tax breaks for families, an end to the Iraq war, investments in renewable energy and reduced health care costs.

"None of this will be easy," he said. "It won't happen overnight. But I believe we can do all this because I believe in America. At each and every moment in our history, we've risen to meet our challenges, because we've never forgotten the fundamental truth that in America, our destiny is not written for us, but by us.

"In three days, we can write our nation's next great chapter," he said.