Since 1936,the candidate who lead in the polls at this stage won 18 out of 19 times.They won the popular vote 18 out of 19 times
http://fivethirtyeight.blogs.nytimes.com/2012/09/24/the-statistical-state-of-the-presidential-race/
First, the polling by this time in the cycle has been reasonably good, especially when it comes to calling the winners and losers in the race. Of the 19 candidates who led in the polls at this stage since 1936, 18 won the popular vote (Thomas E. Dewey in 1948 is the exception), and 17 won the Electoral College (Al Gore lost it in 2000, along with Mr. Dewey).
http://fivethirtyeight.blogs.nytimes.com/2012/09/24/the-statistical-state-of-the-presidential-race/
First, the polling by this time in the cycle has been reasonably good, especially when it comes to calling the winners and losers in the race. Of the 19 candidates who led in the polls at this stage since 1936, 18 won the popular vote (Thomas E. Dewey in 1948 is the exception), and 17 won the Electoral College (Al Gore lost it in 2000, along with Mr. Dewey).