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Sen. Barack Obama's victory Thursday in critical Democratic Iowa caucuses indicate voters saw him as a candidate of change, according to entrance polls.

Garnering 38 percent, the freshman Illinois senator is the first African-American ever to win the Iowa caucuses, a key stepping stone on the path to the White House.

"On this January night, at this defining moment in history, you have done what the cynics said we couldn't do," Obama told wildly cheering and chanting supporters Thursday night. "We are choosing hope over fear, we are choosing unity over division and sending a powerful message that change is coming to America." Watch Obama's victory speech Read full article »

CNN's Candy Crowley, Suzanne Malveaux and Jessica Yellin contributed to this report.

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