President-elect Obama will review all the executive orders issued by President Bush to determine which ones should be repealed, said his transition chief John Podesta.When asked by Chris Wallace on Fox News Sunday what some of Obama's first decisions might be to prove his dedication to changing Washington, Podesta said Obama would probably overturn the ban on stem cell research as well as orders concerning healthcare and energy transformation."There's a lot the president can do using his executive authority without waiting for congressional action and I think we'll see the president do that," Podesta said.He also said Obama has won a "real mandate for change" with Tuesday's election.