+1 to Nate
We have national elections, we have state elections, we have county elections, and we have local elections. Listening to the world's opinion on my vote for president would be like letting the rest of the country tell us who to elect for governor. The reason we have regional government is because some of us want the ability to shape our own local governmental atmosphere the way we want to. The separation of the state and federal government powers has been explicitly drawn for just such a reason.
I'll place my vote for president, in part due to the effect I think he/she will have on other countries, but not because of what the residents of another country think.