US Democratic presidential candidate Illinois Senator Barack Obama on the tarmac near his campaign plane in Reno, Nevada, September 29, 2008. (EMMANUEL DUNAND/AFP/Getty Images) #

Democratic presidential candidate Sen. Barack Obama is silhouetted as he speaks at a rally in front of Morrill Hall at the University of Nevada at Reno in Reno, Nev. Tuesday, Sept. 30, 2008. (AP Photo/Alex Brandon) #

A woman is overcome with emotion after meeting Democratic presidential candidate Illinois Senator Barack Obama at a rally on October 3, 2008 in Abington, Pennsylvania. (STAN HONDA/AFP/Getty Images) #

US Democratic presidential nominee Senator Barack Obama is reflected in a teleprompter as he speaks at a campaign rally in Philadelphia, October 11, 2008. (REUTERS/Jim Young) #

Democratic presidential candidate, Sen. Barack Obama is shown on television screens during the final presidential debate with Republican presidential candidate Sen. John McCain at Hofstra University in Hempstead, N.Y, Wednesday, Oct. 15, 2008. (AP Photo/Jae C. Hong) #

Democratic presidential candidate, Sen. Barack Obama waves as he arrives at a rally in Henderson, Nev., Saturday, Nov. 1, 2008. (AP Photo/Jae C. Hong) #

Democratic presidential candidate Illinois Senator Barack Obama walks from his plane on October 3, 2008 after arriving in Philadelphia, Pennsylvania on his way to a rally in Abington, Pennsylvania. (STAN HONDA/AFP/Getty Images) #

Senator Barack Obama takes the ball to the hole as Reggie Love, green jersey, former Duke basketball player, left, and Chris Duhon, former Duke basketball player and now NBA Chicago Bulls player, during a pick-up basketball game on primary day in Chicago, Tuesday, May, 20, 2008. (Doug Mills/ The New York Times) #

Democratic presidential candidate Sen. Barack Obama waves to the crowd at a rally in the rain at the University of Mary Washington in Fredericksburg, Va. Saturday, Sept. 27, 2008.(AP Photo/Alex Brandon) #

Supporters of Democratic presidential nominee Senator Barack Obama (D-IL) listen to his speech during a downpour during a campaign rally at the University of Mary Washington in Fredericksburg, Virginia September 27, 2008. (REUTERS/Jason Reed) #

US Democratic presidential nominee Senator Barack Obama is reflected in the countertop as he places an order at a deli during a campaign stop in Ft. Lauderdale, Florida, October 21, 2008. (REUTERS/Jim Young) #

US Senator Barack Obama addresses the crowd on day 4 of the Democratic National Convention as it concluded at Invesco Field in Denver, CO on Thursday, August 28, 2008. (Yoon S. Byun/Globe Staff) #

US Democratic presidential nominee Senator Barack Obama leaves a campaign rally in Philadelphia, October 11, 2008. (REUTERS/Jim Young) #

Democratic presidential nominee Senator Barack Obama shares a moment with his wife Michelle on stage at a campaign rally outside the Detroit Public Library September 28, 2008. (REUTERS/Jason Reed) #

Democratic presidential candidate Sen. Barack Obama speaks during a rally in Charlotte, N.C., Sunday, Sept. 21, 2008. (AP Photo/Chris Carlson) #

Democratic presidential candidate Sen. Barack Obama listens as storm clouds gather, while he is introduced by Democratic vice presidential candidate Sen. Joe Biden at a rally at the University of Mary Washington in Fredericksburg, Va. Saturday, Sept. 27, 2008. (AP Photo/Alex Brandon) #

Democratic presidential candidate Illinois Senator Barack Obama is photographed October 3, 2008 at the airport in Philadelphia, Pennsylvania before flying to Chicago. (STAN HONDA/AFP/Getty Images) #

Democratic presidential nominee U.S. Sen. Barack Obama exits his vehicle as he arrives to board his plane October 27, 2008 in Chicago, Illinois. (Joe Raedle/Getty Images) #

Democratic presidential candidate, Sen. Barack Obama (lower right) waves as he arrives at a rally of 100,000 supporters in St. Louis, Mo., Saturday, Oct. 18, 2008. (AP Photo/Jae C. Hong) #

Democratic presidential nomineee U.S. Sen. Barack Obama (D-IL) speaks during a rally at Abington High School October 3, 2008 in Abington, Pennsylvania. (Jeff Fusco/Getty Images) #

Democratic presidential nominee Senator Barack Obama boards his plane at Reagan National airport in Washington September 28, 2008. (REUTERS/Jason Reed) #

Democratic presidential candidate Sen. Barack Obama shares a light moment with communications director Robert Gibbs on the tarmac at Midway Airport in Chicago Sunday, Sept. 28, 2008. (AP Photo/Alex Brandon) #

On the eve of the US presidential election, Democratic presidential candidate Illinois Senator Barack Obama speaks during his last campaign rally for the 2008 presidential race in Manassas, Virginia, November 03, 2008. (EMMANUEL DUNAND/AFP/Getty Images) #

Democratic presidential candidate, Sen. Barack Obama speaks as supporters are reflected in the teleprompter at a rally in St. Louis, Mo., Saturday, Oct. 18, 2008. (AP Photo/Jae C. Hong) #

US Democratic presidential candidate Illinois Senator Barack Obama shares a fist bump with Ethan Gibbs, the five year-old son of campaign communication director Robert Gibbs, upon disembarking from his campaign plane at Dulles airport in Chantilly, Virgina, on October 22, 2008. (EMMANUEL DUNAND/AFP/Getty Images) #

US Democratic presidential candidate Illinois Senator Barack Obama disembarks from his campaign plane at Midway airport in Chicago, Illinois, October 19, 2008. (EMMANUEL DUNAND/AFP/Getty Images) #

Democratic presidential nominee U.S. Sen. Barack Obama speaks during a campaign event at Colorado State University October 26, 2008 in Fort Collins, Colorado. (Joe Raedle/Getty Images) #

Democratic presidential candidate, Sen. Barack Obama walks down the steps at the gateway arch in St. Louis, Mo., Saturday, Oct. 18, 2008. (AP Photo/Jae C. Hong) #

US Democratic presidential candidate Illinois Senator Barack Obama points on his way to board his campaign plane in Columbia, Missouri, October 31, 2008. (EMMANUEL DUNAND/AFP/Getty Images) #

US Democratic presidential candidate Illinois Senator Barack Obama is welcomed by his wife Michelle and daughters Malia, 11 and Sasha, 7, upon landing in Pueblo, Colorado, on November 01, 2008. (EMMANUEL DUNAND/AFP/Getty Images) #

Democratic presidential candidate Sen. Barack Obama, D-Ill., holds up a ballot receipt after casting his vote at a polling place in Chicago, Tuesday, Nov. 4, 2008. (AP Photo/Jae C. Hong) #

US President-elect Senator Barack Obama enters the stage with his two daughters, Sasha and Malia, and his wife Michelle to speak to supporters during his election night rally after being declared the winner of the 2008 U.S. Presidential Campaign in Chicago November 4, 2008. (REUTERS/Jim Young) #

A spectator raises her fist in celebration seconds after it was announced that Barack Obama will be the 44th President of the United States at Ebenezer Baptist Church, Tuesday, Nov. 4, 2008. (AP Photo/Pouya Dianat, Atlanta Journal & Constitution) #