Senate Republicans’ health care bill drops the House’s so-called MacArthur amendment for an approach that lets states do more with waivers already available under the Affordable Care Act and that makes those waivers easier to get. Reps. Tom MacArthur (R-NJ) and Mark Meadows (R-NC) wrote the House amendment, which lets states drop the ACA’s 10 essential health benefits and lets states waive rules against charging people with preexisting conditions higher premiums if those customers do not maintain continuous coverage. The...