Can the 'Battery Belt' jolt Democrats to save their majorities in Congress?

Politicians and green advocates pin hopes on major investments in swing states.

Cleveland: Can the Rust Belt be transformed into the Battery Belt? Photo: Andrew Bardwell/flickr.

Late last week, Treasury Secretary Janet Yellen headed to Cleveland. No, she wasn’t going to the Rock & Roll Hall of Fame, which is located in that gritty northern Ohio City; rather, she was attending the opening of newly formed Manufacturing Advocacy and Gr…