‘His loans have Russian co-signers’: Lawrence O’Donnell attempts to reignite the Russia narrative with a single anonymous source

Is this true or not? Is it even bad? Who knows. We have zero context for it. But resistance Twitter is pretty psyched about it even though it’s just a single anonymous source:

Video here:

And here’s O’Donnell telling the news to Rachel Maddow:

This seems like a pretty explosive charge to make with only one source. Let’s see if it hold up, at all: