Democrat Barack Obama is saying John McCain's mortgage buyout plan would cost taxpayers billions of dollars and reward bad behavior by lenders.
Obama says McCain's plan would force the government to absorb the full cost of renegotiating mortgages to prevent borrowers from losing their homes. He said lenders should share some of the costs.
He was speaking in Dayton, Ohio, on Thursday at the start of a two-day bus tour of Ohio.
Obama told thousands at a baseball stadium that McCain's plan "would guarantee that American taxpayers lose by handing over $300 billion to underwrite the kind of greed and irresponsibility on Wall Street that got us into this mess."