| Obama | Romney |
| 99.0% probability of winning | 1.0% probability of winning |
| Mean of 321 electoral votes | Mean of 217 electoral votes |
[Note: See update at the end of the post]
Last week’s analysis of state head-to-head polls showed President Barack Obama leading Mitt Romney, 327 to 211 electoral votes and with a 99.6% probability of winning an election held then. With 18 new state head-to-head polls weighing in on the contest, Mitt Romney has gained a little more. Here are the polls:
| start | end | sample | % | % | % | |||
|---|---|---|---|---|---|---|---|---|
| st | poll | date | date | size | MOE | O | R | diff |
| FL | SurveyUSA | 17-Jul | 20-Jul | 647 | 3.9 | 47.9 | 43.4 | O+4.5 |
| MI | Rasmussen | 23-Jul | 23-Jul | 500 | 4.5 | 48 | 42 | O+6 |
| MI | Mitchell | 23-Jul | 23-Jul | 825 | 3.4 | 44 | 45 | R+1 |
| MI | PPP | 21-Jul | 23-Jul | 579 | 4.1 | 53 | 39 | O+14 |
| MN | SurveyUSA | 17-Jul | 20-Jul | 552 | 4.3 | 45.9 | 39.7 | O+6.2 |
| NV | WeAskAmerica | 17-Jul | 18-Jul | 1092 | 3.0 | 49 | 43 | O+6 |
| NV | Magellan Strategies | 16-Jul | 17-Jul | 665 | 3.8 | 50 | 46 | O+4 |
| NJ | Quinnipiac | 09-Jul | 15-Jul | 1623 | 2.4 | 49 | 38 | O+11 |
| NM | PPP | 13-Jul | 16-Jul | 724 | 3.6 | 49 | 44 | O+5 |
| NY | Quinnipiac | 17-Jul | 23-Jul | 1779 | 2.3 | 55 | 32 | O+23 |
| NC | Civitas | 16-Jul | 18-Jul | 600 | 4.0 | 49 | 48 | O+1 |
| OH | Rasmussen | 18-Jul | 18-Jul | 500 | 4.5 | 47 | 45 | O+2 |
| PA | PPP | 21-Jul | 23-Jul | 758 | 3.6 | 49 | 43 | O+6 |
| PA | Rasmussen | 18-Jul | 18-Jul | 500 | 4.5 | 48 | 44 | O+4 |
| VA | Rasmussen | 16-Jul | 17-Jul | 500 | 4.5 | 47 | 46 | O+1 |
| VA | Quinnipiac | 10-Jul | 16-Jul | 1673 | 2.4 | 44 | 44 | tie |
| WA | SurveyUSA | 16-Jul | 17-Jul | 630 | 4.0 | 46.0 | 37.3 | O+8.7 |
| WI | WeAskAmerica | 17-Jul | 18-Jul | 1162 | 2.9 | 49 | 42 | O+7 |
Let’s get New Jersey and New York out of the way. They both have double digit leads for Obama.
Obama takes the latest Florida poll (+4.5%), giving him three of the five current polls, and a 62% probability of taking the state at this point.
In New Mexico Obama slips from +11 in the previous poll to a more moderate +5%. Even though a Romney victory at this point still seems unlikely, there is some hint at a softening of support for Obama:
Three polls in Michigan display remarkable heterogeneity. Obama takes one by double digits, one by single digits, and Romney takes one with a +1. The overall trend still looks more favorable for Obama:
Obama gets a +6.2% in Minnesota which actually seems weak. But the graph of polls does not really indicate any radical change in support for Obama over the long run:
Nevada continues to trend Obama, with a +4% and a +6%.
North Carolina gives Obama a slim +1% lead over Romney, but Romney leads in three of the five current polls. At this point, Romney would take the state with 67% probability.
Obama gets a small +2% lead in the Ohio poll. Obama now leads in four consecutive polls for the state, dating back to early June.
Pennsylvania goes +4 and +6 for Obama in two new polls. He leads in all three current polls and would be expected to win the state with a 98.8% probability.
Two new Virginia polls suggest a very tight race. Obama leads Romney by +1% in one and the other is a tie. The five current polls give Obama a slight edge and a 58% probability in an election held now.
In Wisconsin, the latest poll goes +7% for Obama. Obama leads by about the same amount in all three current polls.
Here in Washington Obama is up by +8.7% over Romney. The longer trend strongly hints at an Obama victory here:
After 100,000 simulated elections, Obama wins 99,012 times and Romney wins 988 times (including the 179 ties). Obama receives (on average) 321 (-6) to Romney’s 217 (+6) electoral votes. Obama has a 99.0% (-0.6%) probability of winning and Romney has a 1.0% (+0.6%) probability of winning an election held now.


Here is the distribution of electoral votes [FAQ] from the simulations: [Read more…]





















