Where key Senate races stand in the final days of campaigning

The race for the Senate has moved from off-the-radar a year ago to a dramatic, hard-to-predict finish where Democrats stand a chance of retaking the chamber. The contest will come down to just over a dozen races across the country. Lisa Desjardins takes a look at the map and what might happen.

The race for the Senate has moved from off-the-radar a year ago to a dramatic, hard-to-predict finish where Democrats stand a chance of retaking the chamber. The contest will come down to just over a dozen races across the country. Lisa Desjardins takes a look at the map and what might happen.