Ten days after-the-fact is perhaps a bit early to complete any triage of the wounds inflicted on President Obama by the midterm elections, but it is not too early to say one thing: It could have been worse. Like, Ronald-Reagan worse.
Anyway, the thing that's mostly interesting about that chart is the Reagan line. For the cult-like status that the former president has achieved, the guy had a pretty brutal late-1986. It's not because the Republicans dropped seats in the House (which they did, but only five). It's because of a thing called "Iran-Contra." (Millennials, this is why we invented Wikipedia for you.)
Using polling from WaPo-ABC News polls (and some Gallup number for older presidents), we pulled together this graph of two-termers' second terms, marking the midterms so that you can see the ups and downs. (We haven't polled since the midterms, so Obama's line ends before it.) Flip through.
That Reagan dip is pretty much an outlier. George Bush's unpopularity has tracked roughly with Obama's, though a bit lower. Clinton's stayed pretty flat, dipping slightly once Monica Lewinsky became a household name. Nixon didn't quite make it to midterms. Reagan's dropped pretty dramatically -- almost down to where Obama is now.
The clear winner here is Dwight Eisenhower. His Republican Party lost two seats in his second midterm elections, but he still ended up near 80 percent approval. The Post isn't generally in the habit of making predictions, but we'll make an exception here: Obama will not pull an anti-Reagan, and see his numbers shoot up to 80 percent post-election. But, then, our triage isn't complete.