Four months out from the general election, most pundits and commentators are acting as if Obamacare will have little effect on the results of this year’s races. But given Obamacare’s extraordinary unpopularity, that’s hard to believe. Obamacare is horrible for middle-class Americans: It worsens their job prospects, limits their health-care choices, and raises their premiums, without generally giving them access to its subsidies. That’s a toxic political combination.

Even aside from the presidential election, in which Obamacare should provide strong tailwinds for Donald Trump (if he wisely emphasizes the issue) and correspondingly strong headwinds for Hillary Clinton, a couple of swing-state Democratic Senate candidates are trying to prevail despite having personally voted to pass Obamacare over the clear objections of the American people: Michael Bennet, running against retired Air Force officer (and Air Force Academy graduate) Darryl Glenn in Colorado; and Russ Feingold (dumped by voters after his Obamacare vote), who is trying to regain his prior seat against incumbent Ron Johnson in Wisconsin. Indeed, Bennet’s and Feingold’s votes for Obamacare would seem to represent Glenn’s and Johnson’s best chances of winning.