## Presidential Electoral Vote Simulation Model: 2000, 2004, 2008, 2012

16 Feb

Presidential Electoral Vote Simulation Model: 2000, 2004, 2008, 2012

Richard Charnin
Feb. 16, 2016

Look inside the books:

Each simulation is based on the 2-party unadjusted state exit polls and recorded vote shares. The Total Electoral Vote is calculated based on the results of 500 election simulation trials.

The probability of winning each state is required to calculate the probability of winning 270 Electoral Votes. The state win probability is based on the two-party exit poll (or recorded vote share) and the margin of error (MoE). Win Prob = NORMDIST (vote share, 0.5, MoE/1.96, true)

The Electoral Vote Win probability is the number of winning simulation trials / 500.

Run the simulation

Input Code
Enter an input code (1-8) in cell A6  to indicate the election and the simulation method: state exit polls or recorded votes. For example, code 3 indicates the 2004 exit polls.

2000: 1- exit poll, 2- recorded votes
2004: 3- exit poll, 4- recorded votes
2008: 5- exit poll, 6- recorded votes

2000
Gore defeated Bush by  544,000 recorded votes but lost the electoral vote. But Gore won the unadjusted state exit poll aggregate by 50.7-45.6%. Given 105.4 million recorded votes, the exit polls indicated that Gore won by at least 5 million votes. He led the exit polls in 11 states with 154 electoral votes which all flipped to Bush. If Gore had captured just ONE of the 11 states, he would have won the election.

2004
Bush had 50.5 million recorded votes in 2000. Kerry had a 48.3% recorded share and 252 EV and lost by 62-59 million votes.

In order to match the 2004 recorded vote, the 2004 National Exit Poll indicated an impossible 110% turnout of 52.6 million living Bush 2000 voters in 2004.

Uunadjusted state and national exit polls indicated that Kerry had 51-52% and won by 5-6 million votes with 349 EV. Seven states with 97 electoral votes flipped from Kerry in the exit polls to Bush in the recorded vote: CO,FL,IA,MO,NV,OH,VA. Kerry would have had 349 electoral votes had he won the states. The True Vote Model indicates that he had 53.5% and won by 10 million votes.

2008
Obama had a 52.9% recorded share (a 9.5 million vote margin) and 365 electoral votes. But he had a 58% share in the unadjusted state exit polls (matched by the True Vote Model) which indicates that he won by 23 million votes and had 420 electoral votes.

Obama led the unadjusted 2008 National Exit Poll (17,836 respondents, 2% MoE) by 61-37%, an astounding 30 million vote margin.

2012
Only 31 states were exit polled. The  unadjusted state and national exit polls were not available so the State True Vote Model shares were used for the simulation. Obama had 55% of early voters and 59% of 11.7 million late provisional and absentee ballots. But he lost on Election Day by 50-48% for a 51-47% total margin. The True Vote Model indicated that he had at least 55%.

Simulation Posts:

1988-2008 State and National Presidential True Vote Model