In less than a month, millions of Americans will vote for either Romney or Obama to become the 45th President of the United States. Presidential elections are held every four years on the Tuesday after the first Monday in November, as decided long ago so that crops would be in but weather not too cold for travel. Americans won't know who will get to live in the White House for the next four years until after November 6th when they cast their ballots to select the next president.