Eckerstrom, following his upset win against Bivens two weeks ago.To cop a line from that Don McLean song, somewhere Satan is laughing in delight. And Zona Republicans are laughing right along with him. This, at the news that Arizona state Democratic Party Chair Paul Eckerstrom has resigned his post after scoring an upset victory against former state party chair Don Bivens just two weeks ago.In an e-mail sent out to his fellow Dems today, Eckerstrom cited time and travel constraints as the two bi