CHICAGO — Rafi Zelikowsky skipped class on Tuesday to camp out in downtown Chicago and wait for Barack Obama, the man who captured the hearts of so many young voters.

"We're feeding off the energy," said Zelikowsky, a 19-year-old Northwestern University student from Los Angeles who arrived at 7:30 a.m. EST to stand in a long line outside the park where supporters awaited Obama's victory address more than 15 hours later. Zelikowsky, who voted for Obama by absentee ballot in California, also spent her previous weekend canvassing for the Illinois senator in rural Iowa.

That kind of loyalty — and the Obama campaign's early efforts to harness young voters — paid off at the ballot box.

Exit polls showed that young voters were supporting him by a more than 2-1 margin, with his greatest support coming from black and Hispanic young people. The preliminary results are similar to those from polls conducted before the election.

Overall, about two-thirds of voters younger than 30 supported Obama. And the overwhelming majority of black voters and about three-quarters of Hispanic voters in that age bracket said they voted for Obama. Many young voters said Obama being black was a nonissue.

Meanwhile, more than half of white youths cast a vote for the senator from Illinois, while more than two out of five supported John McCain, the senator from Arizona.

Many young voters, black youths included, saw this election as their chance to help make history. And they did.

"I've been wanting to vote. I'm finally part of it," said Chamar Morrison, a 19-year-old sophomore at North Carolina Central University who is black and who voted for Obama. She listed the cost of a college education and the war in Iraq as two of her top issues.

The exit polls showed support for Obama steadily decreasing as the age of the voters who were questioned increased. For instance, little more than half of voters older than 65 supported McCain. But this time, it was the younger generations who had the final say.

The survey results are based on a random sample of nearly 18,000 voters in Election Day exit polls and telephone interviews over the past week for early voters. The exit poll was conducted for The Associated Press by Edison Media Research and Mitofsky International.

Mark Hugo Lopez, associate director at the Pew Hispanic Center, said the exit poll results fit his expectations. He also noted that in 2004 young, white voters went for President Bush over Democrat John Kerry, like the older age groups did.

This time, there was a shift in favor of the Democrats.

Lopez said strong support from young voters clearly helped Obama win.