I think that most middle of the road independents do understand dual citizenship, at least to the level where they will wonder why he is loyal to 2 countries. I firmly believe that most Americans want a candidate who has 100% loyalty to one, and only one, country ... the USA.
Well, I guess we will have to disagree on this. I form my opinion by being part of focus groups on political advertisements in 2008.
By the way, you have a cool profession! Don't you wish your kids would listen to your instructions as well as your computer listens to your instructions.
Bingo!