Sun Oct 12, 4:28 PM ET
Democratic presidential candidate, Sen. Barack Obama, D-Ill., center, talks to supporters as he campaigns in Holland, Ohio, Sunday, Oct. 12, 2008.(AP Photo/Jae C. Hong)



Sun Oct 12, 4:28 PM ET
Democratic presidential candidate, Sen. Barack Obama, D-Ill., center, talks to supporters as he campaigns in Holland, Ohio, Sunday, Oct. 12, 2008.(AP Photo/Jae C. Hong)



Sun Oct 12, 4:34 PM ET
Democratic presidential candidate, Sen. Barack Obama, D-Ill., right, kisses Angela Zimmann as he campaigns in Holland, Ohio, Sunday, Oct. 12, 2008.(AP Photo/Jae C. Hong)



Sun Oct 12, 4:36 PM ET
Democratic presidential candidate, Sen. Barack Obama, D-Ill., right, shakes hands as he campaigns in Holland, Ohio, Sunday, Oct. 12, 2008.(AP Photo/Jae C. Hong)



Sun Oct 12, 4:38 PM ET
Democratic presidential candidate, Sen. Barack Obama, D-Ill., center, campaigns in Holland, Ohio, Sunday, Oct. 12, 2008. (AP Photo/Jae C. Hong)



Sun Oct 12, 4:41 PM ET
Democratic presidential candidate, Sen. Barack Obama, D-Ill., right, walks with local field organizer Kimberly Heretick as he campaigns in Holland, Ohio, Sunday, Oct. 12, 2008.(AP Photo/Jae C. Hong)



Sun Oct 12, 4:54 PM ET
Democratic presidential candidate, Sen. Barack Obama, D-Ill., pats a dog as he campaigns in Holland, Ohio, Sunday, Oct. 12, 2008.(AP Photo/Jae C. Hong)



Sun Oct 12, 4:55 PM ET
Democratic presidential candidate, Sen. Barack Obama, D-Ill., right, laughs as he greets supporters in Holland, Ohio, Sunday, Oct. 12, 2008.(AP Photo/Jae C. Hong)



Sun Oct 12, 4:56 PM ET
US Democratic presidential nominee Senator Barack Obama (D-IL) gets a hug from a supporter as he canvasses a neighbourhood in Holland, Ohio, October 12, 2008. REUTERS/Jim Young (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008(USA)



Sun Oct 12, 4:56 PM ET
US Democratic presidential nominee Senator Barack Obama (D-IL) (2nd R) speaks to voters as he canvasses a neighbourhood in Holland, Ohio, October 12, 2008. REUTERS/Jim Young (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008(USA)



Sun Oct 12, 4:56 PM ET
US Democratic presidential nominee Senator Barack Obama (D-IL) speaks to voters as he canvasses a neighbourhood in Holland, Ohio, October 12, 2008. REUTERS/Jim Young (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008(USA)



Sun Oct 12, 4:56 PM ET
US Democratic presidential nominee Senator Barack Obama (D-IL) speaks to voters as he canvasses a neighbourhood in Holland, Ohio, October 12, 2008. REUTERS/Jim Young (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008(USA)



Sun Oct 12, 5:04 PM ET
Democratic presidential candidate, Sen. Barack Obama, D-Ill., right, poses with Angela Zimmann as he campaigns in Holland, Ohio, Sunday, Oct. 12, 2008.(AP Photo/Jae C. Hong)



Sun Oct 12, 5:05 PM ET
Democratic presidential candidate, Sen. Barack Obama, D-Ill., waves to supporters as he campaigns in Holland, Ohio, Sunday, Oct. 12, 2008.(AP Photo/Jae C. Hong)



Sun Oct 12, 5:06 PM ET
Democratic presidential candidate, Sen. Barack Obama, D-Ill., right, poses with supporters as he campaigns in Holland, Ohio, Sunday, Oct. 12, 2008.(AP Photo/Jae C. Hong)



Sun Oct 12, 5:06 PM ET
US Democratic presidential nominee Senator Barack Obama (D-IL) (C) speaks to a potential voter as he canvasses a neighbourhood in Holland, Ohio October 12, 2008. REUTERS/Jim Young (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008(USA)



Sun Oct 12, 5:09 PM ET
Democratic presidential candidate, Sen. Barack Obama, D-Ill., campaigns in Holland, Ohio, Sunday, Oct. 12, 2008.(AP Photo/Jae C. Hong)



Sun Oct 12, 5:24 PM ET
US Democratic presidential nominee Senator Barack Obama (D-IL) speaks to a potential voter as he canvasses a neighbourhood in Holland, Ohio October 12, 2008. REUTERS/Jim Young (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008(USA)