November 5, CNN

Barack Obama told supporters that "change has come to America" as he claimed victory in a historic presidential election.

"The road ahead will be long. Our climb will be steep. We may not get there in one year or even one term, but America -- I have never been more hopeful than I am tonight that we will get there. I promise you -- we as a people will get there," Obama said in Chicago, Illinois, before an estimated crowd of up to 240,000 people.

With Obama's projected win, he will become the first African-American to win the White House.

Obama had an overwhelming victory over Sen. John McCain, who pledged Tuesday night to help Obama lead.

"Today, I was a candidate for the highest office in the country I love so much, and tonight, I remain her servant," McCain said.

McCain called Obama to congratulate him, and Obama told the Arizona senator he was eager to sit down and talk about how the two of them can work together.

President Bush also called Obama to offer his congratulations.

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photo: Sen. Barack Obama addresses a crowd of 125,000 people in Chicago, Illinois. (CNN)