As Trump moves to undo decades of work—begun by Republican President Richard Nixon—to protect people and nature from toxic chemicals, two recent pro-polluter policies are especially likely to harm his own voters.Last week, Trump’s Environmental Protection Agency—when will they rename it?—rolled back Biden-era limits on the amount of mercury pollution that coal plants can emit. Mercury can cause serious neurological damage to kids, especially babies (including unborn babies, another group this pr...