I found the following interesting.

[quakerboy]

In the Following states, McCain has gotten more primary votes than either Obama or Clinton
Arizona(his home state)
Nebraska (a nonbinding primary)
Washington (a nonbinding primary)

In the following states, McCain has gotten more primary votes than Obama
Florida
Michigan(with his name not on the ballot, it would be hard not to)


In the following states, McCain has gotten more primary votes than Clinton
South Carolina
Oregon (Not fully reported, but So far true)

[msallied]

1. To be fair...

When did McCain clench the nomination? Because I'm sure that Republican primaries that took place after that fact had lower voter turnout than if he were still running a competitive race.

[quakerboy]

2. Well, three of the 4 most interesting ones

came before that. MI, FL, and NC came before, where Oregon, obviously comes after.

If you count close calls, then you can add the following:

He came close to Hillary in
Alabama
Georgia
And counted more in the Kansas Caucus

And close to Obama in
New Hampshire
Oklahoma
West Virginia