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From the opinion pages of the Wall Street Journal,

this is Potomac Watch.

The Supreme Court pulls the drain

on the Environmental Protection Agency's

overreach on wetlands regulation

as a new analysis warns of a risk

of widespread electricity blackouts

and brownouts this summer.

Welcome, Kyle Peterson with the Wall Street Journal.

We are joined today by my colleagues,

columnists Alicia Finley and Kim Strassel.

Let's start with the Supreme Court.

There is a landmark case there on the Clean Water Act

and a significant controversy over the last several years

involving the waters of the United States.

Alicia, can you give us a sense of what this ruling was about

and the significance of it?

So this ruling was about the Clean Water Act.

It's a 1970s era law that allows Congress,

...