Democratic presidential candidate, Sen. Barack Obama, D-Ill., shakes hands with supporters after his primary night rally
Tuesday, June 3, 2008, in St. Paul, Minn. (AP Photo/Jim Mone)




Democratic presidential hopeful, Sen. Barack Obama D-Ill., covered in hand as supporters surround
him after his primary election night speech in St Paul, Minn. Tuesday, June 3, 2008. (AP Photo/Chris Carlson)




US Secret Service agents pull supporters hands off of US Democratic presidential candidate
Senator Barack Obama (C) (D-IL) at his South Dakota and Montana presidential primary election
night rally at the Xcel Energy Center in St. Paul, Minnesota, June 3, 2008. REUTERS/Jason Reed




Democratic presidential candidate, Sen. Barack Obama, D-Ill., supporters, from left, Megan Bott, Michelle Boese,
and Busi Moshoeshoe-Sikosana, cheer as they watch Obama give a speech at a primary night rally on television
at Wiley's Tavern Tuesday night, June 3, 2008 in Sioux Falls, S.D. (AP Photo/Dave Eggen)




Supporters of US Democratic presidential candidate Senator Barack Obama (D-IL) cheer as
Obama speaks at his South Dakota and Montana presidential primary election night rally
at the Xcel Energy Center in St. Paul, Minnesota, June 3, 2008. REUTERS/Jason Reed




Supporters of US Democratic presidential candidate Senator Barack Obama (D-IL) cheer
their candidate during his South Dakota and Montana presidential primary election night rally
at the Xcel Energy Center in St. Paul, Minnesota, June 3, 2008. REUTERS/Jason Reed




Supporters of US Democratic presidential candidate Senator Barack Obama (D-IL) cheer
at his South Dakota and Montana presidential primary election night rally at the Xcel Energy Center
in St. Paul, Minnesota, June 3, 2008. REUTERS/Eric Miller




Supporters wave flags as they await the arrival of Democratic presidential candidate Sen. Barack Obama, D-Ill.,
for a primary night rally Tuesday, June 3, 2008, in St. Paul, Minn. (AP Photo/M. Spencer Green)




A supporter holds up a banner as he awaits the arrival of Democratic presidential candidate, Sen. Barack Obama, D-Ill.,
for a primary night rally Tuesday, June 3, 2008, in St. Paul, Minn. (AP Photo/M. Spencer Green)




David Axelrod, chief strategist for U.S. Democratic presidential candidate Barack Obama's campaign,
speaks on his mobile phone after stepping off Obama's plane in St Paul, June 3, 2008, en route to
Obama's final primary night rally. The United States is holding its final democratic primaries in South Dakota
and Montana on Tuesday. REUTERS/Jason Reed