Political control of the Arizona Senate is on the ballot, with Democrats gunning to break a nearly 25-year string of Republican dominance. Voters' choices in several swing districts will determine whether Republicans retain control,

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,