As per the statistics given by various organizations worldwide for the 56th Presidential elections of USA which were to be held on Nov 4th 2008 between Barack Obama(democrat) and John McCain (Republican), Obama received 62% votes on an average of different surveys.
The reasons for this public opinion is as follows:
The Americans were waiting for a change in order to face the financial, political crisis, and also the problem of terrorism. Barack Obama was entirely opposing George Bush in his policies and also he presented himself as a person with global outlook and as a leader for change.
Obama also opposed dropping of nuclear bombs on terrorists, his idea was to remove nuclear weapons from the hands of terrorists. For this he also announced to withdraw armies from Iraq from the day he took the power in his hands. He also put forth his policies to end terrorism in front of the people.
His foreign policies on not only Iraq but also on all the countries like Afghanistan, Pakistan, China, India, Europe, Africa etc attracted the Americans to vote for Obama. Besides this John McCain supported George bush and his foreign policies. His foreign policies were also not so realistic. This made people think twice before voting to him.