New Delhi, July 18 -- WASHINGTON - By the time Detroit residents checked their air quality apps Friday morning, their city had joined Washington, D.C., on a global pollution ranking nobody wanted to lead. The orange haze thickening over Lake Michigan had traveled hundreds of miles, pushed south by a heat dome trapping smoke from more than 830 wildfires burning across Canada. More than 100 million Americans were breathing air their doctors told them to avoid.

Into that health crisis, Senator Bernie Moreno of Ohio, a close ally of President Trump, arrived with legislation. He announced this week that he would introduce the Countering Atmospheric Nuisances Arising from Drifting Airborne Foreign Incendiary Residual Emissions Act - better kno...