US Democratic presidential nominee Senator Barack Obama (D-IL) canvasses a neighbourhood in Holland, Ohio October 12, 2008.


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.


HOLLAND, OH- OCTOBER 12: Democratic presidential nominee U.S. Sen. Barack Obama (D-IL) speaks with voters as he canvasses a neighborhood October 12, 2008 in Holland, Ohio. Obama is in Ohio to prepare for the third and final presidential debate which will be held October 15th at Hofstra University in Hempstead, New York.


US Democratic presidential nominee Senator Barack Obama (D-IL) speaks to potential voters as he canvasses a neighbourhood in Holland, Ohio October 12, 2008.


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.


US Democratic presidential nominee Senator Barack Obama (D-IL) canvasses a neighbourhood in Holland, Ohio, October 12, 2008.


HOLLAND, OH- OCTOBER 12: Democratic presidential nominee U.S. Sen. Barack Obama (D-IL) speaks with voters as he canvasses a neighborhood October 12, 2008 in Holland, Ohio. Obama is in Ohio to prepare for the third and final presidential debate which will be held October 15th at Hofstra University in Hempstead, New York.


HOLLAND, OH- OCTOBER 12: Democratic presidential nominee U.S. Sen. Barack Obama (D-IL) speaks with voters as he canvasses a neighborhood October 12, 2008 in Holland, Ohio. Obama is in Ohio to prepare for the third and final presidential debate which will be held October 15th at Hofstra University in Hempstead, New York.


HOLLAND, OH- OCTOBER 12: Democratic U.S. presidential nominee Sen. Barack Obama (D-IL) speaks with voters as he canvasses a neighborhood October 12, 2008 in Holland, Ohio. Obama continues to campaign as Election Day begins to draw near while he runs against his Republican presidential nominee U.S. Sen. John McCain (R-AZ).


HOLLAND, OH- OCTOBER 12: Democratic presidential nominee U.S. Sen. Barack Obama (D-IL) speaks with voters as he canvasses a neighborhood October 12, 2008 in Holland, Ohio. Obama is in Ohio to prepare for the third and final presidential debate which will be held October 15th at Hofstra University in Hempstead, New York.


Democratic presidential candidate, Sen. Barack Obama, D-Ill., right, laughs as he greets supporters in Holland, Ohio, Sunday, Oct. 12, 2008.


HOLLAND, OH- OCTOBER 12: Democratic presidential nominee U.S. Sen. Barack Obama (D-IL) pets a dog as he speaks with voters while canvassing a neighborhood October 12, 2008 in Holland, Ohio. Obama is in ohio to prepare for the third and final presidential debate which will be held October 15th at Hofstra University in Hempstead, New York.


Democratic presidential candidate, Sen. Barack Obama, D-Ill., right, gets a high-five from a boy as he campaigns in Holland, Ohio, Sunday, Oct. 12, 2008.