Key Senate races
Control of the Senate is at play in the midterm elections. The interesting races aren't all happening in traditional swing states. Here is a list of key races to watch and which counties will matter on Election Day.
By Darla Cameron, Ted Mellnik and Aaron Blake
* Latest information available from the Center for Responsive Politics.
SOURCES: Center for Responsive Politics, Federal Election Commission, U.S. Census American Community Survey. GRAPHIC: Jose DelReal, Masuma Ahuja, Tim Farnam. Updated Nov. 12, 2014.