No doubt it's factually correct, but it seems like the sort of thing that could tick off open-minded but traditional voters.
Traditional voters aren't open minded about deciding who to vote for at all. That's the whole point; identity trumping a consumer choice.
Unless thou bist using "traditional" as a euphemism for something else.
Frankly, I don't understand what you mean by traditional. I mean the plain meaning of the word -- people who embrace tradition. They usually vote red, but would be willing to listen to a blue candidate. Murtha's comments run the risk of pushing them back to their default position -- "if that's how them liberals see us..."