Look more specifically at the two chambers here. Senate side, this, if you're a Democrat, this is the particularly tough one. They need a net gain of four seats to get control of the Senate.Take a look at the map here. How would they get four. Four is their target number.There's first thing they can't lose ground. Georgia, New Hampshire, Michigan, Democratic seats, big primary coming up in Michigan in a few weeks there. They could have general election implications.Democrats have to win those just to not lo ...