Why presidental election is so important in the world?

If you mean the presidental election in the USA, then I believe that people are sick and tired of aggressive and greedy for oil America with a complete idiot for a president.
Hopefully the newly elected president will be able to change the country for better. Obama is young and smart. It will be tough to solve so many problems the US is facing right now but he will cope. He will stop the war in Iraqand step by step will fix the country's economy.
I am sure the country will once again regain its prosperity and respect in the world.