The most unlikely climate hero of 2019 is Steve Castor's grocery bag

I don’t know why Steve Castor, the Republicans' counsel in the impeachment inquiry against President Donald Trump, decided to bring his stuff to Monday’s hearing in a reusable plastic grocery bag instead of a briefcase.

But here is what I, a slightly overworked climate change reporter, like to imagine is what happened.

Over the weekend, Steve Castor was …