Follow the money: $2.9 billion, and where it landed

Republican-side groups have outspent Democratic-side groups all year. In the last two weeks, the Democratic side caught up.

We built a new page that follows every dollar of outside money in this year's Senate and House races, from who paid to where it landed. It's free, and you can steer it yourself: members.rationalground.com/follow-the-money.

Outside money in the races we forecast: who paid, which state, which race. Blue flows help Democrats, red flows help Republicans.

The …