he gets tons of national attention. but his argument, scott brown running against elizabeth warren's native american heritage did not play with voters in massachusetts. a poll taken in the thick of the controversy back in may found that 69% of likely voters thought that it warren's heritage was not a significant story and the polls did not much move one way or the other and the whole thing sort of fizzled out. but now he's behind in the polls. now that he's behind, this is what scott brown wants his campaign to be about now. it was not just the debate on thursday night where he brought up warren's heritage unprompted. he unveiled his new ad today and