Engaged in a useless Twitter battle with a conservative who seems to have just discovered the tactic of blaming the Confederacy and Jim Crow on the Democratic Party as though the ideological sorting-out of the two parties, in which civil rights was central, never happened. Ugh.
Here are some remains of the day:
* Long, long Columbia Journalism Review piece looks at past, present and future of Politico.
* In new NBC/WSJ poll, HRC’s ratings continue to track Obama’s pretty closely overall and in most demographic groups.
* At Ten Miles Square, Martin Longman quotes from a South Carolina secession document for the benefit of anyone still under the illusion that the Confederacy was not about slavery.
* At College Guide, Jill Barshay examines the dearth of math majors.
* At The Grade, Alexander Russo discusses the initial reaction to Campbell Brown’s new education site, The Seventy Four.
And in non-political news, sorta:
* Temperature hits 90 in DC for 19th time in 2015. I can remember summers in DC when it didn’t hit 90 until July.
That’s it for Tuesday. We’ll close with one more June Carter Cash tune, her own composition, though her husband made it famous: “Ring of Fire.”

Selah.