Barack Obama was declared the winner almost immediately after the polls closed. He won with 58% of the vote to Hillary Clinton's 42%.

Obama was strongly favored to in the Oregon primary, especially after a rally in Portland on May 18, 2008 attracted 75,000 supporters.

With this primary, Obama has secured the majority of pledged delegates.

1. 65% of white men voted for Obama
2. 50% of white women voted for Obama
3. 18-29 year olds: 71% voted for Obama; 29% for Clinton
4. 30-44 year olds: 62% voted for Obama; 38% for Clinton
5. 45-59 year olds: 54% voted for Obama; 45% for Clinton
6. 60 and over: 44% voted for Obama; 55% for Clinton

1. Federal Gas Tax: 65% of Clinton voters support suspension, as opposed to 35% of Obama voters
2. 90% of Obama supporters said they would not be satisfied with a Clinton nomination
3. 57% of Obama supporters said they would be happy with either candidate's nomination, as opposed to 43% of Clinton supporters

1. A survey of voters taken immediately after they have exited the polling stations
2. Asks the voter which candidate they voted for
3. Pollsters are usually specialized private companies working for newspapers or broadcasters
4. Exit polls give an indication of the election result before the actual votes are counted