For what it’s worth Intrade shows the following odds-

California Senate (Barbara Boxer) to win- Bid 75

Delaware Senate Democrat to win-  bid 89

Nevada Senate Democrat to win- bid 55

Connecticut Senate Democrat to win-  bid 85

Any bid over 50 means they are slanted to win.  For those unfamiliar with Intrade these can change dramatically in a short time period.  But I have often found Intrade to be a reliable indicator. It will be interesting to monitor these numbers in the next month.