In a surprise shift from previous elections, Arizona Republicans believe early-voting numbers could be the party’s key to success.

You may be wondering if your vote matters. Here's how the Electoral College works, how electors are chosen and how many votes Arizona gets.

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,