DE-Sen: Castle(R) 44% - Biden(D) 36%

[Lunar]

Not that it's relevant, given that Castle is a sick elderly man that has been friends with the Biden family for how many decades?  Four and counting?

[Lunar]

I think if Castle runs, no matter who is opponent is, it'll be an easy tossup in an off-year.

Ironically, Castle is on track to face Carney for his House seat this year.  I think Carney is just doing it to further build name recognition, connections, relevance, and an off-chance at a House seat if Castle bows out [voluntarily or not].

Does Castle have another six years in him before retirement?

[Lunar]

No Republican could bloody up Castle.  Bloodying mostly only works if the victim is being bloodied from someone more centrist than himself -- or if the general election opponent holds certain anti-partisan positions to lure them away like a pro-life Democrat against a pro-choice Republican -- although perhaps five to ten dissatisfied Republicans could stay home (it's hard to imagine them not wanting to beat Beau though).