Not that I would have picked it, but no NOTA option? That's at least a plausible outcome...
If you're delusional. Barring a massive swing of Democratmentum and every nominee pulling a Mourdock, they WILL get at least one of these.
Agreed, but you should have included it as an option -- By 538 odds, Republicans have right under a 0.5% of clean sweeping all 7 of these races. Your poll allows us to pick all 7 races as Republican wins. On the other hand, Democrats have a 0.3% chance of sweeping all 7, but your poll does not allow us to predict that outcome.
The two probabilities are virtually indistinguishable. Doesn't it make sense to make both options available as a poll choice if 1 of them is?