New EPA rule could save 4,200 lives a year. Industry warns it could cost Biden his reelection.

The Environmental Protection Agency is preparing to significantly strengthen limits on fine particle matter, one of the nation’s most widespread deadly air pollutants, even as industry groups warn that the standard could erase manufacturing jobs across the country.

Several major companies, trade associations and some Democratic lobbyists are trying to preempt the rule by suggesting it could harm President Biden’s reelection chances in key swing states. They say the tougher standard for soot and other pollutants could destroy factory jobs and investments in the Midwest and elsewhere, undermining Biden’s pitch that he has revitalized these areas more than Donald Trump, the GOP presidential front-runner.