Oregon Democrats have until the end of Tuesday to contribute their choices in the primary.

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Could Oregon decide the Democratic nominee?

More: Focus turns to Oregon Primary

That’s a question many are asking, but it doesn’t appear to have a simple answer.

Sen. Barack Obama’s campaign officials insist the race is nearly over. Obama appears to be the favorite in Oregon and last Sunday drew the largest crowd of his 15-month marathon campaign for the presidency.

Details: Obama draws largest crowd of campaign at Portland rally

Sixty-thousand people packed into a park alongside the banks of the Willamette River to listen to Obama, with another 15,000 left standing outside the gates, according to city fire officials. Hundreds more anchored their motorboats, or floated in kayaks and canoes.

More: Clinton wins Kentucky primary

However, Sen. Hillary Rodham Clinton won the Kentucky primary on Tuesday. Her campaign officials insist the race is still on and that she has a shot at winning the nomination.

Also: Clinton on KGW Town Hall: 'Don't count me out'

There are 52 pledged delegates in Oregon and 51 in Kentucky.

Obama has a lead over Clinton in regard to delegates. A total of 2,026 are needed to secure the Democratic nomination, according to the Associated Press.

However, delegate tallies are subject to frequent change since they include unpledged superdelegates. The superdelegates are not obligated to commit to a certain candidate prior to the Democratic National Convention.