Kyle Kondrik sneaks a very early look at it:
Republicans really helped themselves by running up the score last month in the Senate. The importance of netting nine seats in 2014 as opposed to, say, seven or eight, is clear when one looks at the 2016 contests. If the Republicans were at only a 52-48 edge — a net gain of seven — then Democrats could get to a 51-49 majority in 2016 just by holding all of their own seats and winning the three Toss-ups, Illinois, Pennsylvania, and Wisconsin. The chances of that combination happening wouldn’t be 50-50, but they would be fairly close to even, and control of the Senate would be very much up in the air to start.
But because the Democrats need to net four or five seats to take control, depending on the party of the next vice president,the Democrats’ opening odds to win the majority are significantly less than 50-50. In order to capture the Senate, Democrats will have to put some currently leaning or likely Republican seats in play, along with winning their own seats and the three GOP-held Toss-ups. That’s certainly possible, but the GOP starts with a clear edge as the cycle begins.