President Barack Obama waits in the Butlers' Pantry before he is introduced during the National Governors Association meeting at the White House, Feb. 22, 2010. (Official White House Photo by Pete Souza)

President Barack Obama addresses the National Governors Association in the State Dining Room of the White House, Feb. 22, 2010. (Official White House Photo by Pete Souza)

President Barack Obama talks with Vice President Joe Biden in the Oval Office, Feb. 22, 2010. (Official White House Photo by Pete Souza)

President Barack Obama holds his knee in his hands during a meeting with staff for health care summit preparation in the Oval Office, Feb. 22, 2010. (Official White House Photo by Pete Souza)

President Barack Obama and First Lady Michelle Obama smile as they walk through the crowd at the Governors Ball in the State Dining Room of the White House, Feb. 21, 2010. (Official White House Photo by Pete Souza)

Harry Connick Jr. and his Big Band perform during the Governors Ball in the East Room of the White House, Feb. 21, 2010. (Official White House Photo by Pete Souza)

President Barack Obama and First Lady Michelle Obama dance together during the Governors Ball in the East Room of the White House, Feb. 21, 2010. (Official White House Photo by Pete Souza)

President Barack Obama and First Lady Michelle Obama applaud the performance of Harry Connick Jr. and the Big Band during the Governors Ball in the East Room of the White House, Feb. 21, 2010.(Official White House Photo by Pete Souza)

President Barack Obama and First Lady Michelle Obama dance together during the Governors Ball in the East Room of the White House, Feb. 21, 2010. (Official White House Photo by Pete Souza)

Trip Director Alan Fitts, center, briefs from left, First Lady's Communications Director Camille Johnston, First Lady Michelle Obama, First Lady's Traveling Aide Kristen Jarvis, Treasury Secretary Timothy Geithner, First Lady's Policy Director Jocelyn Frye, and Agriculture Secretary Tom Vilsack during the flight from Andrews Air Force Base to Philadelphia, Pa., Feb. 19, 2010. (Official White House Photo by Lawrence Jackson)

President Barack Obama greets supporters of all ages after a town hall meeting at Green Valley High School in Henderson, Nev., Feb. 19, 2010. (Official White House Photo by Pete Souza)

Vice President Joe Biden talks with National Commission on Fiscal Responsibility and Reform co-chairs Alan Simpson, center, and Erskine Bowles, far left, in the Outer Oval Office prior to a meeting with President Barack Obama, Feb. 18, 2010. Also present in the room, from left, are Director of White House Economic Council Larry Summers, Director of the Office of Management and Budget Peter Orszag, White House Chief of Staff Rahm Emanuel and Chair of the Council of Economic Advisers Christy Romer. (Official White House Photo by Pete Souza)

President Barack Obama looks at a framed image in the backstage hold at The Fillmore Auditorium in Denver, Colo., Feb. 18, 2010. (Official White House Photo by Pete Souza)

President Barack Obama boards Air Force One at Buckley Air Force Base in Denver, Colo., en route to Las Vegas, Nev., Feb. 18, 2010. (Official White House Photo by Pete Souza)

President Barack Obama waves to the crowd at a fundraising reception at the Fillmore Auditorium in Denver, Colorado, Feb. 18, 2010. (Official White House Photo by Pete Souza)

President Barack Obama is saluted by Air Force members as he waves from Air Force One prior to departing from Andrews Air Force Base en route to Denver, Colo., Feb. 18, 2010. (Official White House Photo by Pete Souza)

President Barack Obama talks with friend Mike Ramos before departing for Buckley Air Force Base in Denver, Colo., Feb. 18, 2010. (Official White House Photo by Pete Souza)

Vice President Joe Biden's personal aide Fran Person holds the door for President Barack Obama as he waits to make remarks during the one-year Recovery Act Anniversary event in the Eisenhower Executive Office Building South Court Auditorium of the White House, Feb. 17, 2010. (Official White House Photo by Pete Souza)

Office of Management and Budget Director Peter Orszag attends a meeting with President Barack Obama in the Oval Office, Feb. 16, 2010. (Official White House Photo by Pete Souza)

President Barack Obama signs a blank wall during a tour of the International Brotherhood of Electricians (IBEW) Local 26 headquarters in Lanham, Md., February 16, 2010. (Official White House Photo by Pete Souza)