I spent some time entering data on head-to-head matchups at the state level from SUSA. The compiled data can be seen in this spreadsheet.
If you look at the spreadsheet, this guide will help your interpretation. The first page is the data input, the second compares one Rep to another against the same Dem, the third looks at the shift in support for the Rep if Obama wins the Dem nomination instead of Hillary, and the fourth is an electoral vote analysis of the 15 states covered. Note there was insufficient data on Thompson to include him so I’m left with McCain, Rudy, Romney, and Huck.
Before the data analysis, I must say that these polls show a strong advantage for the Democrats. The Democrats are competitive in states that are considered “red” and have comfortable leads in “purple” states. The only exception to this pattern is when McCain is the Republican nominee. That being said, here are the results of this exercise.
I’ve come to 3 major conclusions:
1) Overall, the Rs do better against Obama, not Hillary in most states. This seems surprising since Hillary is supposedly so divisive. But Hillary leads or ties Romney in all the states I looked at including KS, AL, IA and VA and leads or ties Huckabee in all states except MO and AL. Both do better against Obama. Rudy and McCain do well against Obama with McCain leading Obama in MA, MN, and WA (all Kerry states).
2) McCain polls strongest against both Ds by a significant margin, followed by Rudy. Romney and Huck are both behind the top 2 and even with one another. McCain does much, much better in OH, KY, MN, WI, MA, OR, and VA than the other Republicans. He does better than Romney in all states against Hillary or Obama. He does better than Huck in every state against both Hillary and Obama, except Huck does 7 points better against Clinton in MO. McCain does better than Rudy in 12 of 15 states against Hillary and 13 of 15 states against Obama.
3) Obama does much better in IA than other states. Clinton is more competitive than Obama in almost all of the states. But in IA (where Obama has spent time), he does better against all 4 Rs than Clinton does. He shifts IA by 12 points (against McCain), 9 (Rudy), 8 (Romney), and 15 (Huck). It should be noted that the D leads the R in IA in every matchup except McCain leads Hillary by 4.
More EV analysis below: