Republicans are Gaining in Registered voters

According to an article from the New York Times, Republicans are gaining in the polls in several swing states. There are still more registered democrat voters, but the margin between republican and democrat registered voters are less than it was in 2012. According to this article the Clinton campaign is very invested in florida, by spending tons of money in television ads, more than Trump is. The amount of registered voters may not even matter, this election cycle, because in North Carolina there is about the same number of registered voters with no party affiliation as a many registered Republican voters. This same type of situation is also happening in other states as well. 

Data on the Registered voters