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Bonamici Campaign, File, Associated Press
FILE - This undated photo released by the Suzanne Bonamici campaign shows U.S. Congressional candidate, and former Oregon state Senator, Democrat Suzanne Bonamici. Democrats and their allies, determined not to lose another friendly district because of a sex scandal, have pumped more than $1 million into the Oregon special election race that has turned into a vicious exchange of attacks over the airwaves, as Republican Rob Cornilles, a sports business consultant, tries to extend the effect of scandal that brought down Rep. David Wu, a seven-term Democrat, to the Democrat who wants to take his place.

SALEM, Ore. — Waving signs on street corners and stopping into coffee shops, the candidates hoping to replace former Rep. David Wu made a final push Monday to get their supporters to turn in their ballots.

It's too late to mail them, but voters have until 8 p.m. Tuesday to drop ballots into county collection bins. So far, about 36 percent of registered voters have submitted ballots in the special election for a seat in the U.S. House.

Wu, a Democrat, resigned last year following allegations that he made an unwanted sexual advance.

The special election has been an expensive and sometimes nasty battle fought largely in television ads. As the clock ticked closer to the deadline, the campaigns shifted their focus to getting out the vote.

Republican Rob Cornilles spent part of the weekend with supporters at his campaign headquarters, where he joined volunteers making phone calls to voters who still haven't turned in their ballots. He enlisted support from some celebrities, too — former professional basketball player Antonio Harvey on Saturday, and the starts of TLC's reality show "Little People, Big World" on Sunday.

On Monday, he spent part of the morning waving sings in Beaverton to remind people that election day is near.

"It just feels really good right now," Cornilles said Saturday. "But there's still a lot of work to do, we know. We can't let up on the gas."

Democrat Suzanne Bonamici spent the weekend stopping by restaurants and small businesses. She also shook hands with shoppers at a farmers market in downtown Portland and knocked on doors in Hillsboro.

Her Monday plans included stops to greet potential voters at coffee shops, grocery stores and Portland State University. She also sounded an optimistic chord in a recent interview.

"I feel good about the campaign and the support and the enthusiasm," she said. "But that being said, we aren't taking anything for granted."