Obama : This is Your Victory

Chicago- Barack Obama told supporters that "change has come to America" as he claimed victory in a historic presidential election.Sen. Barack Obama addresses a crowd of 125,000 people in Chicago, Illinois.

1 of 3 more photos »  "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.  Watch Obama pay tribute to McCain »

"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.

Bush told Obama he was about to begin one of the great journeys of his life, and invited him to visit the White House as soon as it could be arranged, according to White House spokeswoman Dana Perino.

Obama will be working with a heavily Democratic Congress. Democrats picked up Senate seats in New Hampshire, New Jersey, North Carolina and Virginia, among others. Read about the Senate races