The Obama Administration is moving to clear up a pivotal issue under one of the nation’s keystone environmental laws, the Clean Water Act, which controls pollution in rivers, lakes, and other waterways. The federal government is preparing a regulation that would clarify which types of waterways and wetlands fall under the purview of that law and which don’t.

The Administration’s move is once again pitting congressional Republicans against the President and some industries against other . . .

The Obama Administration is moving to clear up a pivotal issue under one of the nation’s keystone environmental laws, the Clean Water Act, which controls pollution in rivers, lakes, and other waterways. The federal government is preparing a regulation that would clarify which types of waterways and wetlands fall under the purview of that law and which don’t.

The Administration’s move is once again pitting congressional Republicans against the President and some industries against other . . .