A lack of stability in home prices has made it more difficult for the Obama administration to curb government's role in the country's mortgage-finance giants. David Goldman/AP hide caption

itoggle caption David Goldman/AP

GE CEO Jeffrey Immelt strides to the stage at the GE plant in Schenectady, N.Y., to introduce President Obama on Friday. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

Economists agree that the effort to recalculate the tax system should be guided by the principles of efficiency and simplicity. iStockphoto.com hide caption

itoggle caption iStockphoto.com

White House Press Secretary Robert Gibbs has announced that he will step down from his position at the White House in February to work on the upcoming 2012 campaign. He says the changes coming to the Obama administration amount to a "pretty major retooling." Roger L. Wollenberg/Getty Images hide caption

itoggle caption Roger L. Wollenberg/Getty Images

Sen. Saxby Chambliss (R-GA) says he and Virginia Democrat Mark Warner have been talking regularly with roughly two dozen Senate colleagues about tackling the deficit. Charles Dharapak/AP hide caption

itoggle caption Charles Dharapak/AP

Lawmakers applaud President Obama after he signed the health care overhaul in March. The bill could be subject to funding battles in the next Congress. Win McNamee/Getty Images hide caption

itoggle caption Win McNamee/Getty Images

The sticker distributed by the Union of Concerned Scientists in San Francisco this week. Union of Concerned Scientists hide caption

itoggle caption Union of Concerned Scientists