Which senate loss was more devastating for the Democrats?

[iceman]

Which among the 3 losses hurt the most?

[Tekken_Guy]

The one that was actually preventable.

[CentristRepublican]

Casey in terms of being the only unexpected one.

Brown in terms of being the most poignant. Everyone knew Tester was done, and it's honestly Casey's fault he lost (he fell asleep at the wheel a la Nelson, it seems is the consensus), but Brown had a respectably narrow margin of defeat given the environment. In a better year he'd have won. He outran Harris by nearly 8 points - i.e. if Harris had done just a little better than Biden instead of 3 points worse, Brown would've just about pulled through. Casey should've won even in this environment given that Baldwin and, more pertinently, Slotkin, managed to win.

[Progressive Pessimist]

Casey shouldn't have lost.

Tester's loss was easy to see coming, but only losing by seven-getting McCaskilled more than Heitkamped, wasn't too bad of a showing.

I like Brown the most, and he honestly did okay given the circumstances, but it was never better than a tossup for him. I had Casey at lean D the whole time. I know Pennsylvania as a whole this year sucked, but Casey could have won and saved us one vital seat if he just tried a little harder with his campaign. Slotkin did it, and she wasn't even an incumbent!

[インターネット掲示板ユーザー Punxsutawney Phil]

Casey in terms of being the only unexpected one.

Brown in terms of being the most poignant. Everyone knew Tester was done, and it's honestly Casey's fault he lost (he fell asleep at the wheel a la Nelson, it seems is the consensus), but Brown had a respectably narrow margin of defeat given the environment. In a better year he'd have won. He outran Harris by nearly 8 points - i.e. if Harris had done just a little better than Biden instead of 3 points worse, Brown would've just about pulled through. Casey should've won even in this environment given that Baldwin and, more pertinently, Slotkin, managed to win.

I broadly agree.

[Mr. Smith]

Objectively: Montana, since that's the tipping point.

By Expectations: Pennsylvania by being so unexpected att, Ohio in the sense of the image trying to be protected, and Texas in the sense of dreams or optimism for something better.