In a column for the NEW National Journal, Charlie Cook gives some fortification for Democrats:

"It is not uncommon to hear strategists say that if the environment for House Republicans is so good (or so bad for House Democrats), then the GOP gains could get truly massive and those dynamics are likely to tip the closest Senate races in the same direction. There is probably some merit to that argument.

"But it also seems that the problem-children candidates for Senate Republicans have been called out more than their House GOP counterparts. The GOP candidates with more exotic backgrounds and blemishes seem to be paying a greater price for it in the Senate than in the House.

Can Republicans run the table? "Exceedingly unlikely," he says.