IN FLIGHT - MAY 14: Democratic presidential hopeful Sen. Barack Obama (D-IL) takes questions from reporters during a flight on his campaign plane from Grand Rapids to Chicago on May 14, 2008 in Chicago. During a rally at the Van Andel Arena in Grand Rapids, Michigan, former Senator John Edwards announced his endorsement of Obama after Sen. Hillary Clinton (D-NY) won the West Virginia primary.
IN FLIGHT - MAY 14: Democratic presidential hopeful Sen. Barack Obama (D-IL) takes questions from reporters during a flight on his campaign plane from Grand Rapids to Chicago on May 14, 2008 in Chicago. During a rally at the Van Andel Arena in Grand Rapids, Michigan, former Senator John Edwards announced his endorsement of Obama after Sen. Hillary Clinton (D-NY) won the West Virginia primary.
GRAND RAPIDS, MI- MAY 14: Democratic presidential hopeful Sen. Barack Obama (D-IL) and John Edwards (D) shake hands during a rally at the Van Andel Arena on May 14, 2008 in Grand Rapids, Michigan. Former U.S. Senator Edwards announces his endorsement of Obama after Sen. Hillary Clinton (D-NY) won the West Virginia primary.
GRAND RAPIDS, MI - MAY 14: Democratic presidential hopeful Sen. Barack Obama (D-IL) speaks as former Senator John Edwards (L) waves to the audience during a rally at the Van Andel Arena, May 14, 2008 in Grand Rapids, Michigan. Edwards announced his endorsement of Obama after Sen. Hillary Clinton (D-NY) won the West Virginia primary.
GRAND RAPIDS, MI - MAY 14: Democratic presidential hopeful Sen. Barack Obama (D-IL) (R) and John Edwards (D) (L) wave during a rally at Van Andel Arena, May 14, 2008 in Grand Rapids, Michigan. Former U.S. Senator Edwards announces his endorsement of Obama after Sen. Hillary Clinton (D-NY) won the West Virginia primary.
GRAND RAPIDS, MI - MAY 14: Democratic presidential hopeful Sen. Barack Obama (D-IL) listens to John Edwards (D) speak during a rally at the Van Andel Arena on May 14, 2008 in Grand Rapids, Michigan. Former U.S. Senator Edwards announces his endorsement of Obama after Sen. Hillary Clinton (D-NY) won the West Virginia primary.
GRAND RAPIDS, MI- MAY 14: Democratic presidential hopeful Sen. Barack Obama (D-IL) speaks after being endorsed by John Edwards during a rally at the Van Andel Arena, May 14, 2008 in Grand Rapids, Michigan. Former U.S. Senator Edwards announced his endorsement of Obama after Sen. Hillary Clinton (D-NY) won the West Virginia primary.
GRAND RAPIDS, MI - MAY 14: Democratic presidential hopeful Sen. Barack Obama (D-IL) speaks as former Senator John Edwards (L) listens during a rally at the Van Andel Arena, May 14, 2008 in Grand Rapids, Michigan. Edwards announced his endorsement of Obama after Sen. Hillary Clinton (D-NY) won the West Virginia primary.
GRAND RAPIDS, MI - MAY 14: Democratic presidential hopeful Sen. Barack Obama (D-IL) speaks as former Senator John Edwards (L) listens during a rally at the Van Andel Arena, May 14, 2008 in Grand Rapids, Michigan. Edwards announced his endorsement of Obama after Sen. Hillary Clinton (D-NY) won the West Virginia primary.
GRAND RAPIDS, MI - MAY 14: Democratic presidential hopeful Sen. Barack Obama (D-IL) speaks as former Senator John Edwards (L) listens during a rally at the Van Andel Arena, May 14, 2008 in Grand Rapids, Michigan. Edwards announced his endorsement of Obama after Sen. Hillary Clinton (D-NY) won the West Virginia primary.
GRAND RAPIDS, MI - MAY 14: Democratic presidential hopeful Sen. Barack Obama (D-IL) (L) and John Edwards (D) (R) wave during a rally at Van Andel Arena, May 14, 2008 in Grand Rapids, Michigan. Former U.S. Senator Edwards announces his endorsement of Obama after Sen. Hillary Clinton (D-NY) won the West Virginia primary.
GRAND RAPIDS, MI - MAY 14: Democratic presidential hopeful Sen. Barack Obama (D-IL) (L) and John Edwards (D) (R) wave during a rally at Van Andel Arena, May 14, 2008 in Grand Rapids, Michigan. Former U.S. Senator Edwards announces his endorsement of Obama after Sen. Hillary Clinton (D-NY) won the West Virginia primary.
GRAND RAPIDS, MI - MAY 14: Democratic presidential hopeful Sen. Barack Obama (D-IL) (R) and John Edwards (D) (L) wave during a rally at Van Andel Arena, May 14, 2008 in Grand Rapids, Michigan. Former U.S. Senator Edwards announces his endorsement of Obama after Sen. Hillary Clinton (D-NY) won the West Virginia primary.
GRAND RAPIDS, MI - MAY 14: Democratic presidential hopeful Sen. Barack Obama (D-IL) (R) and John Edwards (D) (L) wave during a rally at Van Andel Arena, May 14, 2008 in Grand Rapids, Michigan. Former U.S. Senator Edwards announces his endorsement of Obama after Sen. Hillary Clinton (D-NY) won the West Virginia primary.
GRAND RAPIDS, MI - MAY 14: Democratic presidential hopeful Sen. Barack Obama (D-IL) (R) and John Edwards (D) (L) wave during a rally at Van Andel Arena, May 14, 2008 in Grand Rapids, Michigan. Former U.S. Senator Edwards announces his endorsement of Obama after Sen. Hillary Clinton (D-NY) won the West Virginia primary.
COLUMBIA, SC - JANUARY 21: (FILE PHOTO)U.S. Presidential candidates U.S. Senator Barack Obama (D-IL) and former U.S. Senator John Edwards stand together during a Martin Luther King Day rally at the state capitol January 21, 2008 in Columbia, South Carolina. It was announced on May 14, 2008 that former Democratic presidential candidate John Edwards will endorse Barack Obama for president at a Michigan campaign event today.
WARREN, MI - MAY 14: Democratic presidential hopeful Sen. Barack Obama (D-IL) holds seven-month old Kabian Allen after speaking at Macomb Community College May 14, 2008 in Warren, Michigan. Senator Obama and Senator Hillary Clinton (D-NY) continue the battle for their party's presidential nomination and face-off in the Kentucky and Oregon primaries on Tuesday, May 20.