As of today, here is the range of possibilities that I give for the Senate and Gubernatorial elections. With this, I consider anything within 3 points to be a toss up. The number on the high-end would mean that party would sweep all races within 3 points.
Senate-GOP gains 1-9 seats.
Governors-Ranges from GOP gains 3 to Dems gain 2.
If we expand this to everything within 5 points (this far out this is still a plausible swing for some races)
Senate- GOP gains 1-9
Governors-Ranges now from GOP gains 5 to Dems gain 8.
The range I put above shows the difficulty of making projections in races at this point. The range off possibilities is quite large. With many of these races so close, a points in one direction or the other could drastically change the map.