Medicare is becoming a hot topic in the race to replace former Representative David Wu.

Republican candidate Rob Cornilles in ads is accusing Democrat Suzanne Bonamici of seeking to cut Medicare benefits for seniors because she supports President Barack Obama’s 2010 health law. The Democratic campaign arm has linked Cornilles with a plan by House Budget Committee chairman Paul Ryan, a Wisconsin Republican, to create Medicare vouchers that passed the U.S. House last April.

In the Oregon race, which will be decided by mail-in ballots by tomorrow, a recent television ad by Cornilles says Democrat Bonamici supports cutting $500 billion from Medicare, and that “hurts seniors.” It’s an attack similar to those used in Republicans’ successful 2010 campaign to regain control of the U.S. House, and it’s a line Republican presidential candidate Mitt Romney is testing in the run-up to the general election.

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