Paul Ryan expected to address Medicare at Ohio rally

DAYTON, Ohio—Republican vice presidential candidate Paul Ryan is expected to discuss the brewing debate over his plan to overhaul the nation's Medicare system on Wednesday at a rally in Oxford, Ohio, a campaign aide said.

Ryan's public remarks during his first days on the campaign trail as Mitt Romney's running mate have focused mostly on energy independence and Romney's proposals for economic recovery.

President Barack Obama's campaign has criticized Romney for choosing Ryan, who, as chairman of the House Budget Committee, proposed a plan to reform the Medicare system by providing subsidies for retirees to purchase health care coverage through the private market. Democrats say Ryan's plan, which would not apply to anyone now over the age of 55, would "end Medicare as we know it," and not provide enough funds for seniors to afford their health care.

On Ryan's flight to Ohio Wednesday, he was seen going over his remarks for the upcoming rally. An aide said that he has been working on his speech with campaign staff throughout the day.

Ryan is expected to speak at Miami University in Oxford, Ohio, at 6 p.m. ET.