This is the only debate scheduled between Republican incumbent Greg Walden and Democrat Aelea Christofferson.
We asked Christofferson what's the biggest difference between her and Walden.
"One of the major ones is health care reform. I've worked on that for nearly a dozen years and help bring health coverage to 350,000 Oregonians, while Walden has voted against it 54 times and that costs millions of dollars to vote that many times. He came out in support of the Ryan budget and that will take healthcare away from 234,000 people who just got it."
The debate will be Sunday at the Sunriver Resort from 5 to 6 P.M.
The event will be moderated by the Bend Chamber's Jamie Christman.