Kevin Drum notes a WaPo poll that finds that roughly half of the people polled think that a candidate who received an endorsement from Obama would make them less likely for that candidate.
Roughly half!
Where I come from, we have a word for people who would find an endorsement from a Democratic President to be a negative: "Republicans".
In a shocking coincidence, they make up roughly half of all Americans.
Let the panic begin.

Also note, in the same post, how quickly the comments degenerate into name-calling.
KD’s comments section is a hive of scum and villainy. the trolls are numerous and hard-working.
This is some of that “data driven” journalism I’ve been reading about, isnt it?