PA, MN shift on ABC News' electoral map

Via ABC News, which today changed both Minnesota and Pennsylvania from solid wins for President Obama to "lean" status on its electoral map:

With one week to go, states that were once considered Obama strongholds now look less solid. Republican groups are putting resources into Minnesota and Pennsylvania. Team Obama brushes off these incursions as wishful thinking by Republicans, but noticeably they are putting money and muscle into both states. Minnesota has been added to Bill Clinton’s schedule. And, Obama campaign officials admitted that they will once again start running ads in Pennsylvania.