I still don't see how they can win 10 Senate seats to gain control. That's very ambitious by any standard. They have to run the table on tossups and then swipe a few relatively safe dem Senate seats.
I don't see how they can take the Senate, but they will make great gains.
By my calculations, the GOP is likely to pick up eight Senate seats (AR, CO, DE, IL, IN, NV, ND and PA). The only GOP seats at risk are in MO (Bond retiring) and NH (Gregg retiring).
To take control of the Senate, we'd have to retain MO and NH, plus gain two of three in CA (Boxer), WA (Murray) and WI (Feingold).
Probably not going to happen.