The Biden administration is planning a series of virtual public listening sessions in late August to gather public input as it works to scrap the Trump-era definition of the “Waters of the United States” or WOTUS and replace it with a new one in two stages. 

But a group of Republican U.S. senators, led by Iowa Sens. Charles Grassley and Joni Ernst, is pushing to maintain the current, commonsense definition included in the Navigable Waters...