"Conservative outside groups spent nearly a year airing ads in Michigan attacking Democratic Sen. Gary Peters and boosting his main Republican rival, John James.

The attacks went virtually unanswered. Then the cavalry arrived.

A trio of so-called super political action committees, or super PACs, tied to major national environmental groups launched a $1 million ad buy in April touting Peters' green record.

It was a sign of what would unfold in the following months as environmentalists became some of the biggest spenders in U.S. politics."

Adam Aton, Timothy Cama, and Nick Sobczyk report for E&E News July 29, 2020. [2]