About 28% of young male voters in Arizona are registered Republican. The number of registered Democrats in this demographic is much lower.

Republicans are going into Election Day with a big lead over Democrats when it comes to early voting totals, according to political consulting firms that are tracking the returns. Why it matters: Though we won't know any results until after the polls close at 7pm Tuesday,

This is the first time that registered Republicans have outvoted registered Democrats in more states since at least 2008, with early voting traditionally favoured by Democrats. Across two-thirds of states that produce early voting data by party,