Read James Clyburn wasn't responsible for the Biden surge. So what was? by Kevin DrumKevin Drum (Mother Jones)
The green dot is February 29, the date of the South Carolina primary. Biden had gained a point or two before that, but he only really started to skyrocket shortly after the primary. So it’s safe to say that his big victory in South Carolina was the proximate cause of his early March takeoff. But what was responsible for Biden’s South Carolina win in the first place?

Biden went up a lot more, but he was taking votes away from Steyer, Warren, Buttigieg, and Klobuchar.
For now, the debate still seems the most likely cause. That’s a little unusual, since conventional wisdom says that debates don’t move public opinion much, but maybe this was an exception. 

Perhaps it was more the fact that the electorate just didn’t know or trust the Steyer, Buttigieg, and Klobuchar centrist crowd enough to vote for them with time running out. As a result the old tried-and-true guy you know pulls in all the people. He didn’t really need an inciting incident other than the looming election. Following the debate without anything else to use to make a decision on, the choice was *fait accompli*.
Annotated on March 07, 2020 at 08:57PM

Read The Benefits of Being Joe Biden’s Brother by Daniel Golden, Chuck Neubauer, Matthew Malone (Mother Jones)
Jim Biden repeatedly tapped into Joe’s political network for help with his finances and to promote his business ventures.
This is solid and needed reporting. The sad fact is that the opposition party doesn’t care about these and is willing to let even worse transgressions go on their side of the aisle, which has gotten us into a much worse situation. I’d much rather see more in-depth reporting on this sort of tangential malfeasance on the current administration (of which I’m sure there is far more than we’ve previously seen).

At this point, I’m not sure that Biden has much of a chance in the Democratic race, but why hadn’t this sort of story come out long before now?