I've only done minimal research on this, but I'm pretty confident that a Biden presidency would be much better for the world than a Trump one.
I'm unsure about the marginal impact of a donation to the Biden campaign though, especially given that he seems to have raised a lot of money as of late (link).
So, do you think donations to the Biden campaign, now or in the future, are cost effective donation opportunities?
Relatedly, should we be volunteering for the Biden campaign?
You might also see the Candidate Scoring System, although I doubt it applies much post-primary.