Senator Mark Pryor is in a tough race this year, but rather than running away he's touting his vote for health care reform in a just released strong ad with his father. DAVID: When Mark was diagnosed with cancer, we thought we might lose him. MARK: My family and my faith helped me through the rough times. DAVID: But you know what? Mark’s insurance company didn’t want to pay for the treatment that ultimately saved his life. MARK: No one should be fighting an insurance company while you’re fighting for your life. That’s why I helped pass a law that prevents insurance companies from canceling your policy if you get sick, or deny coverage for preexisting conditions.