Do we expect a lot of changes with regards to the polls in battleground states between now and November? Presumably even with attack ads isn't it the case that most people would have already made up their minds between the two due to familiarity.
Or do attack ads really make that much of a difference?
I honestly don't see them moving more than 3-5 points in either direction. Trump's support are already spoken for and so is much of Biden's. There are a very small percentage of independents who are still in play for both candidates. Trump needs to regain support from suburban women (who have jumped off the ship a few years ago) and Biden needs to consolidate votes within the Dem party and form some sort of sellable coalition between regular Dems and progressives.