Election Day is Tuesday in the United States, but millions of votes have already been cast .
It’s possible that as many as two-thirds of all votes in the midterm elections will come in the mail or will be cast during early voting.
The balance of power is at stake in Congress. For Democrats to take control of the Senate , they will need to pick up four Republican-held seats while defending three of their own. For Democrats to regain the House majority , they need to gain three seats.
Here are some of the stories that made headlines over the past week, as well as some photos that caught our eye.
