Women 30 and older, all the way up to age 85, will likely decide the election. Liberals, conservatives, younger voters, African-American voters, white men, religious voters — those groups have made up their minds and are less likely to be swing voters now. The samples of Latinos have not been large enough to see if there are swing voters there.
A quote from an insightful assesment of the race on Politico.com from Mark Penn, who served as the key (and controversial) strategist for Hillary Clinton.
