Marine One kicks up snow as it arrives to take President Barack Obama and first lady Michelle Obama to Tucson, Ariz., for a memorial service for the victims in the Arizona shooting on Saturday, in Washington, Wednesday, Jan. 12, 2011.
Former President Bill Clinton and President Barack Obama arrive to speak to reporters in the briefing room of the White House in Washington, Dec. 10, 2010. After a private meeting in the Oval Office, Clinton made a surprise appearance at Obama's side to back the tax cut compromise Obama negotiated with Republicans.
President Barack Obama campaigns for Massachusetts Governor Deval Patrick at the Hines Convention Center, in Boston, Oct. 16, 2010.
Scenes from President Obama's signing of "Don't Ask Don't Tell," at the Interior Department, in Washington, Wednesday, Dec. 22, 2010.
As Secret Service and his limo await him, President Barack Obama, right, greets people at the Philadelphia International Airport, on Sept. 20, 2010. Obama was in Philadelphia to campaign for Democratic Senate candidate Joe Sestak.
President George W. Bush returns to Capitol Hill, for the portrait unveiling of former Senate Majority Leader Bill Frist (R-Tenn.), in the Old Senate Chamber at the Capitol in Washington, Wednesday, March 2, 2011.
Senate Majority Leader Harry Reid speaks to the media after the Democrats' policy luncheonat the Capitol, in Washington, Tuesday, Nov. 16, 2010.
President Barack Obama hustles to his motorcade after greeting visitors upon his arrival at Piedmont Triad International Airport in Greensboro, N.C., Dec. 6, 2010.
The honor guard gets into position during the arrival ceremony at the White House for China's President Hu, in Washington, Wednesday, Jan. 19, 2011.
Clockwise from top left, President Barack Obama meets with Prime Minister Benjamin Netanyahu of Israel, President Mahmoud Abbas of the Palestinian Authority, President Hosni Mubarak of Egypt, and King Abdullah II of Jordan in the Oval Office at the White House, in Washington, Wednesday, Sept. 1, 2010.
First Lady Michelle Obama and President Barack Obama await the arrival of China's President Hu during the official arrival ceremony at the White House, in Washington, Wednesday, Jan. 19, 2011.
President Obama visits 2nd graders at Long Branch Elementary School, in Arlington, Virginia, Friday, Dec. 17, 2010. He read an excerpt from his new children's book "Of Thee I Sing" and also read "The Night Before Christmas."
First Lady Michelle Obama meets with the 2010 Military Children of the Year in the Map Room of the White House.
New York Senator Kirsten Gillibrand prepares for a TV hit to urge support for the James Zadroga 9/11 Health and Compsenation Act, in the Russell Rotunda on Capitol Hill in Washington, Monday, Dec. 20, 2010.
Rep. Michele Bachmann (R-Minn.) talks with Rep. Tom Price (R-Ga.) after a series of votes at the Capitol in Washington, Nov. 18, 2010.
Sen. Barack Obama gives a presidential stump speech at the Ross County Courthouse in downtown Chillicothe, Ohio on Oct. 10, 2008. (photograph shot with Holga camera)
President Barack Obama meets with former Secretary of State Colin Powell in the Oval Office to discuss the New START Treaty, at the White House in Washington on Dec. 1, 2010
President Barack Obama speaks about education and innovation at Forsyth Technical Community College, in Winston-Salem, Monday, Dec. 6, 2010.
The incoming freshmen class of Representatives for the 112th Congress make their way up the House steps on their way to orientation after a group photo, at the Capitol, in Washington, Friday, Nov. 19, 2010.
President Obama pats a young child on the head as he hands out Thanksgiving meals at Martha's Table, a food bank in northwest Washington, in Washington, Wednesday, Nov. 24, 2010.
A Secret Service agent stands by President Obama's limo, outside of a Chrysler Transmission Plant in Kokomo, Indiana, Tuesday, Nov. 23, 2010.
President Obama and President Lincoln in the State Dining Room of the White House.
Incoming Senator Chris Coons (D-Del.) and his family wait for Vice President Joe Biden to arrive to swear him in, in the Old Senate Chamber in the Capitol, in Washington, Monday, Nov. 15, 2010.
Democratic Congressional Campaign Committee chairman Rep. Steve Israel (D-N.Y.) works the phones at night as he talks with state legislators across the country, on Capitol Hill, in Washington, Wednesday, Feb. 16, 2011.
President Obama delivers his State of the Union address, in the House Chamber at the Capitol, in Washington, Tuesday, Jan. 25, 2011.
Staff members, along with a few members of Congress, observe a moment of silence on the Capitol steps for Rep. Gabrielle Giffords and the others who were killed or wounded in the shootings over the weekend, Monday, Jan. 10, 2011.
President Barack Obama boards Air Force One at Andrews Air Force Base, en route to North Carolina to visit Forsyth Technical Community College, outside Washington, Monday, Dec. 6, 2010. (Drew Angerer/ The New York Times)