Fore as in past, My self hold no vested interest in who makes the American Presidency as long as they leave us alone. But then, to at least leave a comment as a response to your efforts in research and presenting this presentation.
The Union of States other wise known as the United States, has from its own conception, a methodology in the election/chosing their president. One such as we know, is the popular vote, whilst the other, is the Electoral College as depicted as follows:
Whilst above perhaps appears to skip the chosen topic, this will follow hand in hand with your presentation. My own personal observation is the polls provide such pre-vote guess work, it is then though some what speculation.
But then as above, it is interesting what the polls do say for as to provide food for thought and with this, the danger of some people holding trust in what the printed word provides and change their minds from on candidate to another simply by what the poles are indicating. If the poles are honest is one thing, whilst though, a presented pole paid for by one candidate could by this effect, give cause for trusting people to simple vote for that candidate not knowing they have been manipulated by a false pole. Honesty is one thing, but in politics, money speaks very well to the receiver.