The biggest threat to your health isn’t your inability to afford an inhaler or to get that weird mole checked, the GOP argues. It’s everything else about American society, from nutrition to neurotoxins.Unfortunately, the party’s agenda would make those other societal problems worse, too.Republicans desperately want to cut taxes this year, which will be expensive. So, they’re plotting to pay for the revenue loss (at least partly) by slashing the safety net. Among the biggest programs on the chopping block: Medicaid and Obamacare marketplace subsidies, which help low- to middle-income Americans purchase private-market insurance.Of course, the last time Republican lawmakers...